2nd Year Statistics Chapter 5 TestSimple Linear Regression And Correlation

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. The formula for the regression coefficient of y on x is:

   1. 

   2. 

   3. 

   4. 

2. y is the ...... of two regression coefficients b_xy and b_yx

   1. Arithmetic Mean

   2. Geometric Mean

   3. Harmonic Mean

   4. None of these

3. If the movements of the variables X and Y are in the opposite direction, the correlation between X and Y is said to be:

   1. Positive

   2. Negative

   3. Zero

   4. -1

4. The product of two regression coefficient will be:

   1. Positive

   2. Negative

   3. Both positive or negative

   4. Not definite

5. The independent variable is also called the:

   1. Regression variable

   2. Predictor

   3. Response variable

   4. Both (a) and (b) but not (c)

6. The regression coefficients b and d in the respective regression lines  and  are:

   1. Both positive

   2. Both negative

   3. One is negative and other positive

   4. Both (a) and (b) but not (c)

7. If  then  is:

   1. 0.4

   2. 0.6

   3. 0.8

   4. 0.10

8. The formula of r is given by:

   1. 

   2. 

   3. 

   4. 

9. In regression problem, the independent and dependent variables are:

   1. Both fixed

   2. Both random

   3. Independent variable is fixed and dependent variable is random

   4. Dependent variable is fixed and independent variable is random

10. Which of the following statements is true about the correlation coefficient r ?

    1. It is the mean of the two regression coefficients

    2. It is the G. M. of the two regressing coefficients

    3. It is the sum of the two regression coefficients

    4. It is the product of the two regression coefficients