NCERT Solutions for Class 17Statistics Chapter 7 Correlation – Here are all the NCERT solutions for Class 11 Statistics Chapter 7. This solution contains questions, answers, images, explanations of the complete chapter 7 titled Correlation taught in Class 11. If you are a student of Class 11 who is using NCERT Textbook to study Statistics, then you must come across chapter 7 Correlation. After you have studied lesson, you must be looking for answers of its questions. Here you can get complete NCERT Solutions for Class 11 Statistics Chapter 7 Correlation.
NCERT Solutions Class 11 Statistics Chapter 7 Correlation
Here on AglaSem Schools, you can access to NCERT Book Solutions in free pdf for Statistics for Class 11 so that you can refer them as and when required. The NCERT Solutions to the questions after every unit of NCERT textbooks aimed at helping students solving difficult questions.
For a better understanding of this chapter, you should also see summary of Chapter 7 Correlation , Statistics, Class 11.
| Class | 11 |
| Subject | Statistics |
| Book | Statistics For Economics |
| Chapter Number | 7 |
| Chapter Name |
Correlation |
NCERT Solutions Class 11 Statistics chapter 7 Correlation
Class 11, Statistics chapter 7, Correlation solutions are given below in PDF format. You can view them online or download PDF file for future use.
Correlation
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Question & Answer
Q.1: The unit of correlation coefficient between height in feet and weight in kgs is
(i) kg/feet
(ii) percentage
(iii) non-existent
Ans : (iii) Non-existent Explanation: Correlation coefficient has no unit. It is pure numeric term used to measure the degree of association between variables.
Q.2: The range of simple correlation coefficient is
(i) 0 to infinity
(ii) minus one to plus one
(iii) minus infinity to infinity
Ans : Minus one to plus one Explanation: The value of correlation coefficient lies between minus one to plus one, if the value lies outside this range it indicates error in calculation.
Q.3: If \(r_{x y} \text { is positive the relation between } x \text { and } Y\) is of the type
(i) When Y increases X increases
(ii) When Y decreases X increases
(iii) When Y increases X does not change
Ans : (i) When Y increases X increases Explanation: A positive correlation implies that both the variables move in a similar direction. If there is a increase in X, Y also increases in same direction.
Q.4: If \(r_{x y}=0 \text { the variable } X \text { and } Y\) are
(i) linearly related
(ii) not linearly related
(iii) independent
Ans : Not linearly related Explanation: \(r_{x y}=0,\) it means that there is a absence of linear relation between the variables, but there may exist a non linear relation between variables.
Q.5: Of the following three measures which can measure any type of relationship
(i) Karl Pearson’s coefficient of correlation
(ii) Spearman’s rank correlation
(iii) Scatter diagram
Ans : Spearman's rank correlation Explanation: Spearman's rank correlation is the measure which can measure any type of relationship. But, Karl Pearson's coefficient is the most widely used method due to the preciseness of the 'r value.
NCERT / CBSE Book for Class 11 Statistics
You can download the NCERT Book for Class 11 Statistics in PDF format for free. Otherwise you can also buy it easily online.
- Click here for NCERT Book for Class 11 Statistics
- Click here to buy NCERT Book for Class 11 Statistics
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