Deck 3: Regression and Hypothesis Testing

Question 1

If r = 1, the angle between the two regression lines is.........................

A)Ninety degree
B)Thirty degree
C)Zero degree
D)Sixty degree

Answer 1

Zero degree

Question 2

If byx > 1, then bxy is:

A)Greater than one
B)Less than one
C)Equal to one
D)Equal to zero

Answer 2

Less than one

Question 3

If X and Y are independent, the value of byx is equal to ........................

A)Zero
B)One
C)Infinity
D)Any positive value

Answer 3

Zero

Question 4

The property that both the regression coefficients and correlation coefficient have same signs is called................................

A)Fundamental property
B)Magnitude property
C)Signature property
D)None of these

Question 5

The property that byx > 1 implies that bxy < 1 is known as .....................

A)Fundamental property
B)Magnitude property
C)Signature property
D)None of these

Question 6

If X and Y are independent, the property byx = bxy = 0 is called ...................

A)Fundamental property
B)Magnitude property
C)Mean property
D)Independence property

Question 7

If the correlation coefficient between two variables, X and Y, is negative, then the regression coefficient of Y on X is.............................

A)Positive
B)Negative
C)Not certain
D)None of these

Question 8

The G M of two regression coefficients byx and bxy is equal to ..........................

A)R
B)r²
C)1 - r²
D)None of these

Question 9

If one regression coefficient is negative, the other is ...............................

A)0
B)- ve
C)+ve
D)Either a or b

Question 10

Arithmetic mean of the two regression coefficients is:

A)Equal to correlation coefficient
B)Greater than correlation coefficient
C)Less than correlation coefficient
D)Equal to or greater than correlation coefficient

Question 11

byx is the regression coefficient of the regression equation.....................

A)Y on X
B)X on Y
C)Either a or b
D)None of these

Question 12

bxy is the regression coefficient of the regression equation.....................

A)Y on X
B)X on Y
C)Either a or b
D)None of these

Question 13

The regression coefficient and correlation coefficient of the two variables will be the same if their .............................are same.

A)Arithmetic mean
B)Standard deviation
C)Geometric mean
D)Mean deviation

Question 14

The idea of testing of hypothesis was first set forth by ..........................

A)R A Fisher
B)J Neyman
C)E L Lehman
D)A Wald

Question 15

By testing of hypothesis, we mean:

A)A significant procedure in Statistics
B)A method of making a significant statement
C)A rule for accepting or rejecting hypothesis
D)A significant estimation of a problem.

Question 16

Testing of hypothesis and ......................are the two branches of statistical inference.

A)Statistical analysis
B)Probability
C)Correlation analysis
D)Estimation

Question 17

......................... is the original hypothesis

A)Null hypothesis
B)Alternative hypothesis
C)Either a or b
D)None of these

Question 18

A null hypothesis is denoted by...........................

A)H0
B)H1
C)NH
D)None of these

Question 19

An alternative hypothesis is denoted by...........................

A)H0
B)H1
C)AH
D)None of these

Question 20

Whether a test is one sided or two sided, depends on........................

A)Simple hypothesis
B)Composite hypothesis
C)Null hypothesis
D)Alternative hypothesis

Question 21

A wrong decision about null hypothesis leads to:

A)One kind of error
B)Two kinds of errors
C)Three kinds of errors
D)Four kinds of errors