## NCERT Solutions for Class 11 Statistics Chapter 7 - Correlation

## FAQs on NCERT Solutions for Class 11 Statistics Chapter 7

1. What is Pearson's Correlation Coefficient?

Pearson’s correlation coefficient is used in linear regression. It is used for measuring the strength of the association between two variables - The 7th seventh chapter in the Class 11 Statistics syllabus details this topic with examples.

2. How Many Questions are There in the NCERT Solutions for Class 11 Statistics for Chapter 7?

The 7th chapter in Class 11 NCERT Statistics solutions includes eighteen questions in total. These questions include objective, subjective, as well as numerical problems.

3. How Many Sums are There in NCERT Solutions Class 11 Statistics Chapter 7?

There are three sums in the 7th chapter of NCERT solutions for Class 11 Statistics. Question 16, 17, and 18 are numerical problems.

4. What is correlation Class 11 Statistics Chapter 7?

Correlation in Class 11 is defined as a tool used in statistics for studying the relationship between two variables, for example, change in price leads to change in quantity demanded. Correlation also gives information about the measure of direction and intensity of the relationship between the two variables. It is not the cause and effect relation. Correlation may be classified into two types that are positive and negative correlation.

5. How do you find the Correlation Coefficient for Class 11 Statistics?

Karl Pearson’s Coefficient Correlation can be calculated as the product of moment correlation and simple correlation coefficient. It is a quantitative method of calculating the correlation coefficient. The correlation coefficient can be denoted by the letter V. Students can check the NCERT Solutions for Statistics Class 11 Chapter 7 from the vedantu website or the app. All the solutions are available in the PDF file and students can download the file free of cost for proper understanding of the concepts.

6. How do you solve for Correlation Coefficients?

The Correlation Coefficient can be calculated by two methods. The Actual Mean method and the Assumed Mean method. When the calculations are difficult, we can use the step deviation method for reducing the calculations. Another method that can be used is Spearman’s rank correlation method. It can also be used for calculating the coefficient of correlation of qualitative variables such as bravery, wisdom, beauty, ability, virtue, etc. This method got its name because it was given by the British Psychologist C.E. Spearman.

7. What is the range of simple correlation coefficient Class 11 Statistics?

Correlation can be defined as the measure or a tool that helps to determine the strength and the direction of the relationship between two variables, X and Y. The range of a correlation coefficient is from -1 to 1. Students can check the vedantu’s NCERT Solutions. The Solutions are given by expert teachers in a simple and easy-to-understand language. Students can use the notes for their exam preparation.

8. Does correlation imply causation?

No, correlation does not imply causation. Correlation helps to measure co-variation and not causation. The correlation only helps to understand the idea of the direction and intensity of change in a variable when the correlated variable changes. Correlation between two variables only helps to know that when the value of one variable changes in one direction the value of the other variable may change in the same direction or the opposite direction.