Question:

The value of the correlation coefficient lies between

A.

0 and 1

B.

– 1 and 1

C.

-1 and 0

D.

– 0.5 and 0.5

Answer» b. – 1 and 1

Question:

If the A.M of 14, 16, x, 25, 21 be 19, then the value of x is

A.

16

B.

19

C.

12

D.

21

Answer» b. 19

Question:

The Geometric Mean (GM) for the series 1, 3, 9 is

A.

3

B.

2

C.

1/3

D.

½

Answer» a. 3

Question:

If the sum of squares of the deviations of 10 observations taken from mean 50 is 250,then C.V is

A.

10%

B.

12%

C.

20%

D.

15%

Answer» a. 10%

Question:

The vertical axis of an ogive shows

A.

Cumulative frequencies

B.

Absolute frequencies

C.

Frequency densities

D.

Class boundaries

Answer» a. Cumulative frequencies

Question:

The absolute deviations of the values of a variables from the mean are 10, 15, 19, 2, 14. The mean deviation is 15

A.

16

B.

14

C.

12

D.

9

Answer» c. 12

Question:

If a variable x takes the values 12 and 24 with equal frequencies, then mean of x is

A.

36

B.

18

C.

22

D.

28

Answer» b. 18

Question:

The median of the numbers 94, 33, 86, 68, 32, 80, 48 and 70 is

A.

68

B.

69

C.

64

D.

70

Answer» b. 69

Question:

For a frequency distribution coefficient of skewness = 0.6; mean = 172 and mode = 163.The value of the variance is

A.

169

B.

215

C.

196

D.

225

Answer» d. 225

Question:

Out of total outlay 40,000 (crore) during an annual plan of a country, the central angle represented by education of amount Rs. x crore is 720. The value of x (in crore) is

A.

10,000

B.

9,000

C.

6,000

D.

8,000

Answer» d. 8,000