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# CORRELATION AND REGRESSION: MAJOR DIFFERENCES

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To understand correlation and regression formula, we should first know about bivariate data. When the data is assembled for two variables concurrently, they are known as bivariate data. The corresponding frequency distribution produced by it is known as bivariate frequency distribution.

CORRELATION ANALYSIS

If there is a change in one variable due to a change in another variable irrespective of direct change or inverse change, these two variables are known as correlated. If there is no change in one variable due to a change in another variable, these two variables are uncorrelated.

TYPES OF CORRELATION

There are two types of correlation;

1.    Positive correlation – if one variable increases/decreases and made the same effect on another variable, then they are positively correlated. Variables that are positively correlated move in the same direction. For example, a student’s marks in math and his rank, if his marks increase his rank in class also increase or profit and sale of a company, as much as sales increase profit also increase.

2.    Negative correlation – if one variable increases/decreases and has the opposite effect on another variable, they are known as negatively correlated. Variables that are negatively correlated move in different directions. For example, if the price of an item increases, the demand for that item will decrease. In an uncorrelated variable, the change in one variable does not effect change in another variable. For example, weight and intelligence are uncorrelated.

METHODS TO MEASURE CORRELATION

•    Scatter diagram: it is a diagrammatic method to know the correlation between variables. It helps differentiate between different types of correlation but can not measure the extent of the relationship between the variables.

•    Karl Pearson’s product-moment correlation coefficient is the best method for finding a correlation between two variables. The formula for this method ;

r = rxy =cov(x,y)/sX x sy

•    Spearman’s rank method: this method is used when we have to find a correlation between two qualitative characteristics. It provides rank to the data.

•    Coefficient of concurrent deviation: it is a casual method of finding correlation when the magnitude of two variables doesn’t affect much.

rc= √(2c-m)/m

REGRESSION ANALYSIS

In regression analysis, we calculate the value of one variable based on the given value of another variable with the help of a mathematical relationship between two variables. It plays an important role in today’s activity; for example, a businessman wants to know how much profit he will make from the said investments.

When one variable depends on another variable, we get simple linear regression. Suppose two variables, x and y. If y depends on x, then y will be known as the dependent variable, and x will be the independent variable.

In the case of a simple regression, if y depends on x, then the regression line of y on x is given by y=a+bx. Here a and b are two constants known as parameters, and b is also known as the regression coefficient of y on x and is denoted by bxy. The regression coefficient remains unchanged due to a shift of origin but changed due to a scale shift.

DIFFERENCE BETWEEN CORRELATION AND REGRESSION

• Correlation is a statistical measure that tells the association of two variables, while regression tells how much two variables are related numerically.
• Correlation gives the linear relationship between two variables, and regressions fit the best line and estimate one variable based on another variable.
• Correlation finds the numeric value that tells the relationship between the two variables, and regression tells the value of the random variable based on the fixed variable.
• Correlation does not nominate variables as dependent or independent, and in regression, one variable is dependent, and another variable is independent.
• The correlation coefficient lies between -1 and 1, and in regression, only one regression coefficient can be greater than 1.

CORRELATION AND REGRESSION FORMULA

Formula to find correlation coefficient

Formula to find the least-squares of regression

Conclusion

Now you have understood the concept of regression and correlation, as well as are aware of the formula. It is time to practice some questions and drive the concepts home.

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# A Few Writing Tips for Your Essay

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Writing a good essay can take a lot of effort at times. If you are a university student, you might have to write a lot of essays. If you do content writing, the case is quite similar for you too. Various websites provide you with essay service and help you write them or write one for you. But, if you plan on taking the complete task on yourself, then these few tips might help you work in a particular direction or overall improve your writing.

If you are looking for a website that writes essays for you or provides similar services, there is samedayessay.com

## Use of Different Tools

If you are working on a Word document, the editor option on Word helps you with grammar and punctuation. So, while writing the essay, you will see the score given to your essay writing by the editor and suggestions. Similarly, various other tools, such as Grammarly, help you with your essay writing. These tools suggest you better sentence structuring, transition words and correct your punctuation as well as any potential grammar mistakes.

If you plan on working on an informal essay, add some phrasal verbs and simpler vocabulary. Use imperative voice and maybe add in some questions. For formal style, use technically appropriate language and more formal vocabulary.

These are only some of the tips that may help you with your essay. Remember to take your time to brainstorm before starting your essay. All the best!

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# Why Should You Learn a Second Language and Gain New Skills?

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Many people want to learn a new language. Some want to get a professional advantage, some want to move to a foreign country, and some simply want to impress others by becoming fluent in multiple languages.

If you are thinking about learning a new language and want some motivation to get started, you have come to the right place. Here are a few reasons why learning a new language might be a great idea for you:

The human brain works in mysterious ways. It essentially acts like any other muscle, the more you use it, the stronger it gets. Learning a new language is not an easy feat. It takes a lot of hard work and commitment.

Plus, you have to really push your brain to learn new grammar rules, vocabulary, and different verb conjugations. This gives your brain a good workout on a daily basis which makes it stronger. So, learning a new language will considerably improve your memory and other psychological skills.

### Makes You a Better Decision-Maker

Most bilingual people reverent back to their mother tongue when they get emotional. This is because our emotions are deeply connected with our mother tongue.

One of the best things about learning a new language is that you get the ability to distance yourself from your emotions which can help you make much better decisions. Thus, learning a new language makes you a better and improved decision-maker which can help you a lot in different aspects of your life.

If you want to become an effective communicator in your second language, you are going to have to put yourself out there and step out of your comfort zone. This means you are going to make a lot of mistakes, sometimes even in front of a bunch of people. This kind of exposure can be very good for your self-confidence.

When you conquer your fears and do what you are afraid of, you start to believe in yourself. This is why learning a new language is great to boost your self-confidence.

### Opens Up New Learning Opportunities

Learning a new language will give you access to many study materials that you would not have understood before. This way you can open yourself up to learning tons of new things that could never have even imagined.

If you aren’t a native English speaker, you need to start by learning English, because it is a universal language. Plus, it will open you up to many new learning opportunities. If you are learning English as a second language, you should check out ESL worksheets from JimmyESL.

### Gives You the Ability to Connect with People

Learning a new language will give you the opportunity to connect to a ton of new people. If you can communicate with someone in their mother tongue, you can connect with them and understand them at a much deeper level. This way you might end up making new foreign friends who will help you get a deeper understanding of their language and culture.

Thereby, if you really think about it, learning a new language will not only help you connect with other people, it will also help you understand other cultures at a much deeper level.

### Makes You More Articulate

When you learn the grammar rules, vocabulary, and different verb conjugations for a new language, you get a new appreciation for the speech itself. You start noticing small and intricate details about the way you speak and communicate with others. This makes you much more self-aware and teaches you the art of communicating with others. Plus, you become much better at expressing yourself which makes you more articulate and self-confident.

If all your peers are monolingual, you can get a significant advantage over them by learning a new language. No matter what field of work you belong to, being bilingual is always going to be a plus point for you, especially if you are a part of an international business that hires people from all over the world.

Employees who can communicate well in the overseas market can be very valuable for a company because not only do they bring good communication skills to the table, they also help the business get a better understanding of different cultures. Thus, you can rest assured that learning a new language will surely double your worth as an employee at your workplace.

#### The Final Word…

Learning a new language will help you evolve as a human being and open up tons of new avenues that you would not have had access to had you not learned a new language. So, get started right away if you want to learn a new language without thinking twice.

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# Why Choose Canada for Studying?

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Canada for Study may be a land of endless possibilities. Every year, nearly 500,000 international students select North American countries as their study destinations. The universities there are comparable to;

the University of British Columbia,

the University of Toronto

and McGill University ranks extremely in world university rankings.

With immigration friendly policies, you’ll need to be a locality of this area to remain responsive to various studies. And you will get work opportunities that expect you. In addition, Canada has about 100 universities and 200 colleges.

Canada offers many scholarships specifically for international students. The educational opportunities in Canada are excellent, along with the best education, a safe environment and inclusive, and friendly people.

## Why do people choose Canada to study?

Many students choose North American country for learning abroad due to its howling array of study fields.

• There’s one thing in Canada for everybody to assist students in gaining valuable skills for tomorrow’s dynamic job market.
• Another smart reason to settle in Canada for studying abroad is its availability.
• Average university fees are lower there than within the America and UK.

The University of provincial capital alone is conducted annually, getting ready to \$1 billion in the analysis. Thus, Canada has attained its place as a pioneer in science, technology, and innovation through sustained investments.

Once you choose to study abroad, you’re creating a wise alternative concerning future permanent residency if you want that.

Once you meet the minimum education, you may apply for a visa for permanent residency. If approved, then you’ll board North American country forever, a nation that welcomes all folks and embraces diversity.

It’s nice knowing that Canada has been known as “one of the safest countries within the world for international students.”

Canada is a multilingual country. Therefore, studying is a great way to improve your language skills and increase your prospects for an interesting career.

Courses in French and English are an integral part of Canada’s educational system and enrich your life, culture, and Community.

The Government of Canada offers an employment program with a diploma from a tertiary school in Canada. Canadian government wish to gain work experience. It is a great way to continue living in Canada while bringing variety and developing your professional skills.

Canada was the first country to connect its schools and libraries to the Internet through its innovative SchoolNet program.

According to a study by the Canadian Internet Registration Authority (CIRA);

Canadians rank second in the world for the average number of hours spent online per user (41.3 hours per month).

## How to get Study Visa?

You can apply for a Canadian study permit on the Citizenship and Immigration Canada (CIC).

Applicants must provide the following when applying for a study visa;

• Biometric proof (such as fingerprints or photographs)
• Medical attestation certificate
• Criminal record assent
• Proof of funds that you can support financially

## Consultants at Canada Prime Immigration:

Visa consultants such as Canada Prime Immigration guide students through all the details of education in Canada.

Consultants at Canada Prime Immigration provide detailed information about universities, scholarships and visa information.

CPI also offer clients the opportunity to apply in Canada. Moreover, we offer students scholarships and employment opportunities even after graduation.

Our main objective is to satisfy our clients by helping them achieve their goals in life.

We always try to comfort our customers by helping them answer their questions.

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# Most Easy-To-Understand NEET Chemistry Preparation 2020 – Physical Methods Described

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The vast majority of medical hopefuls go over the Chemistry section of NEET. They are either reading too much biology or physics. The best strategy to learn for NEET Chemistry will help students prepare for the exam and recognise its value.

Many candidates studying to achieve the National Eligibility Cumulation Entrance Test (NEET) don’t give much thought to the Chemistry component of the test. This might cause anxiety in the days leading up to the exam and low section scores.

The NEET Chemistry part is assigned an overall weightage of 25% in the test is one of the most important elements. Inadequate time spent on this area could cost you marks and prevent you from getting into the college of your choice.

How do you prepare for a test? NEET Chemistry is a collection of all the valuable tips and tricks we’ve discovered. These NEET Chemistry test preparation ideas can help you prepare for the exam clearly and organise.

## NEET Chemistry Preparation 2020 – Physical

NEET 2021 is finalised to be held on September 12th, 21.  As a result, you’ll get a month to prepare for the exam. Chemistry will be included in 45 of the 180 questions on the NEET exam. Candidates with a strong understanding of the subject will easily score in the 100s to 120s on the NEET.

However, getting a higher score in NEET Chemistry than this isn’t easy. To achieve a score higher than this, you must have a thorough comprehension of the subject.

It’s important to note that the structure of the NEET exam has altered from the previous year.

The exam has been changed to a Chemistry exam with two parts. Section A will consist of 35 questions, and Section B will consist of 15 questions, ten of which must be answered. The table after the next paragraph contains information on how to prepare for the NEET 2021 Chemistry section.

Let us begin by valuing NEET Chemistry Preparation Tips to improve our scores.

## Deriving A Pattern From The Last Year’s Question Papers

In contrast to Biology and Physics, the Chemistry section of NEET is difficult to decipher an outline from the questions. Chemistry has a structure that is more varied than the other sciences in terms of structure.

However, it is clear that most of the questions are theoretical and can be answered by anyone who has thoroughly read the NCERT textbooks. The following is a rough breakdown of the questions in the Chemistry sections:

## How to Prepare for NEET Chemistry?

NEET Chemistry is broken down into three sections. Each portion, as well as its manner of preparation, is individual. Each of the three areas does not require the same level of preparation. Each section’s preparation procedure is discussed in full below.

### Physical Chemistry

There will be approximately 15 Physical Chemistry questions, the majority of which will be mathematically based. Ionic and chemical equilibrium, liquid solutions, the redox process, and electrochemistry are the four main topics covered in this category.

The majority of Physical Chemistry difficulties are centred on these four categories. However, you must first master the fundamentals before attempting to answer the questions. The following is a suggested study sequence for this section of the NEET Chemistry exam.

1. Read the NCERT chapter with the utmost attention.
2. Make a mental note of the crucial formula on a piece of paper.
3. Read and comprehend the same chapter from your preferred reference book.
4. Recognise how the formulas are used.
7. To achieve excellence, revise in the same order.

### Organic Chemistry

There will be 14-18 questions in the NEET Chemistry segment. General Organic Chemistry is the most important chapter in this division. To get a good grade on this section, you must understand the fundamental principles and apply them.

You must be able to complete the Isomerism and Effects in addition to GOC. The bulk of the questions in this section will be easier to answer with this combination.

Experts recommend that you finish at least GOC, hydrocarbons Alcohol, Amines Alkyl Halide, and Aldehyde before beginning to work on the tasks in this area.

### Inorganic Chemistry

Medical students frequently make the error of failing to pay attention to this section of NEET Chemistry. The number of questions posed in this part has been comparable to those asked in organic/physical chemistry in recent years.

NEET 2021 is scheduled to have 10- 18 questions. Chemical bonding, coordination compounds, and p-blocks are the essential chapters in that portion of NEET Chemistry. They make up roughly 6-8 questions based on them when taken together.

The majority of the problems in this section are taken from NCERT textbooks. As a result, your primary focus in this subject should be on the NCERT texts.

In recent years, the number of questions posed in this section has been comparable to the number of questions posed in organic/physical chemistry.

The NEET 2021 exam will consist of 10 to 18 questions. The most important chapters in that section of NEET Chemistry are chemical bonding, coordination molecules, and p-blocks. When they’re added together, they make up about 6-8 questions.

This section’s issues are mostly from NCERT textbooks. As a result, the NCERT textbooks should be your primary focus on this topic.

## Concluding with a few key points to consider

• Check out your NCERT textbooks carefully, as the majority of the questions come from here.
• Complete all the questions from NCERT Exemplar. Exemplar was specifically designed with the competitive exam in mind. It is a great source of interesting questions.
• Answer Previous year’s question Exam Papers to better understand the pattern of the exam, its levels of difficulty, the types of questions, and more. This will assist you in determining your preparation level and assist in quickly revising all the syllabus.
• Practice questions are taken from the NEET Archive. It contains questions from the past 10 years and is extremely helpful in understanding the differences and difficulties of the questions.
• To ensure the ultimate performance possible for the NEET Chemistry section, set the timer for 40-50 minutes, regardless of the difficulty on your NEET test paper.
• To increase efficiency and speed, take at least a practice Test every day between 2 pm until 5 pm, as planned to take the NEET 2021 test. It will also help you impressively improve your ability to manage time by adjusting your body clock according to that for your exam time.
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# Avoid these mistakes while preparing for a Class 7th Maths Olympiad

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The preparation for any Olympiad can be highly tiring and exhausting for any student, regardless of how bright they may be. When it comes to taking any type of examination, concentration, motivation, and confidence are all critical aspects to consider. Preparation begins with patience and effort on the part of the student. Mathematics is one of those courses that require all of these features, as well as a great deal of repetition and practice. When it comes to studying for a test, many students are at a loss as to where they should begin. Mathematics is one of those courses where you cannot simply learn or memorize the material; rather, it requires you to have strong fundamentals and immense practice.

While it is important to know what you need to do while preparing for a Maths Olympiad, it is equally important to know what mistakes not to make while preparing for an Olympiad.

1. Not revising Class sixth Mathematics concepts

A seventh-grade mathematics curriculum is built on the foundations of sixth-grade mathematics. It is critical for every student, regardless of whether or not they are participating in the olympiad, to be thoroughly familiar with the topics that were taught to them in sixth grade. Because these principles form the basic foundation of what you will learn in seventh grade. Students who are having difficulty should set aside some time to review and practice the ideas they are having difficulty with. A teacher or an expert should even be approached for assistance when it is absolutely required.

1. Giving an exam without a strategy

A set approach is required for every examination, and this is especially true for mathematics. If you go into a mathematics examination without a plan, you will put yourself under undue strain and squander valuable time. A student who does not have an appropriate technique for navigating through the paper may find themselves caught in a question for an excessive amount of time and lose sight of the passage of time.

This technique would be to skim over the question paper and sort out the questions that are easy for you and fall under the themes that you are most knowledgeable about. Save the most difficult questions for last so that you don’t end up wasting time and lose points on questions that were most likely extremely easy for you.

1. Not clarifying doubts

1. Not setting an objective

It is necessary to establish a goal or a target in order to kick off the process of preparing for the exam and scoring. When you concentrate solely on one thing, you lose the ability to achieve other goals. The aim should be attainable and should be maintained while taking other aspects into consideration. For example, the goal of children in the seventh grade should not only be to do well in the Olympiad, but also to do well in their school assessments. Setting goals is vital because it helps to establish an atmosphere of dedication and concentration. Students who have a goal are more likely than those who do not have a goal to be more determined than their peers. These children are also more likely to achieve their objectives than the ones without any set goal in mind.

1. Not doing enough revisions

While most students believe that they have completed their courses, in reality, they have only begun the process of preparing for their exams. Rather than simply finishing the curriculum, students should concentrate on completing numerous rounds of modifications.

Students should be finished with their education in order to be allowed to practice and participate in mock examinations. Students must take advantage of the resources that are accessible to them in order to assist them with revisions. They must go through IMO Class 7 Previous Year Paper 2013 that is easily available on the internet. This will assist you in understanding the format of the examination and provide you with a general understanding of what to expect from Olympiads. Students should make full use of the workbooks and practice papers that have been made available to them for their convenience. To get a diverse range of content, students should reference a variety of writers, including NCERT texts, in addition to one another.

1. Panicking

The sense of uneasiness and being a little terrified is normal since it demonstrates your commitment and serves to sharpen your thoughts so that you do not lose concentration and keep your eyes on the prize, which in this case is passing the Olympiad exams. When uneasiness escalates into a full-blown panic attack or feelings of anxiety and self-doubt, it is considered an issue by the medical community. No matter how well-prepared a person is, panic and worry can impair a student’s ability to succeed. It is recommended that you be cool and composed prior to an examination. Unnecessary stress has its own set of consequences, most of which are detrimental, particularly in courses such as mathematics, which need an individual’s complete concentration and attention.

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