## CBSE Class 9 Statistics MCQ By Clarify Knowledge

*CBSE Class 9 Statistics MCQ New Pattern 2022*

## OUR EBOOKS CAN HELP YOU CLASS 10 BOARD

## CODE IS EASY CAN HELP YOU IN SEMESTER 2

## CBSE Class 9 Statistics MCQ Table

Question 1.

The class mark of the class 90-130 is:

(a) 90

(b) 105

(c) 115

(d) 110Answer

Question 2.

The range of the data:

25, 81, 20, 22, 16, 6, 17,15,12, 30, 32, 10, 91, 8, 11, 20 is

(a) 10

(b) 75

(c) 85

(d) 26Answer

Question 3.

In a frequency distribution, the mid value of a class is 10 and the width of the class is 6. The upper limit of the class is:

(a) 6

(b) 7

(c) 10

(d) 13Answer

Question 4.

The width of each of five continuous classes in a frequency distribution is 5 and the lower class-limit of the lowest class is 10. The lower class-limit of the highest class is:

(a) 15

(b) 30

(c) 35

(d) 40Answer

Question 5.

Let m be the mid-point and 1 be the lower class limit of a class in a continuous frequency distribution. The upper class limit of the class is:

(a) 2m + l

(b) 2m – l

(c) m – l

(d) m – 2lAnswer

Question 6.

The class marks of a frequency distribution are given as follows:

15, 20, 25, …

The class corresponding to the class mark 15 is:

(a) 12.5 – 17.5

(b) 17.5 – 22.5

(c) 18.5 – 21.5

(d) 19.5 – 20.5Answer

Question 7.

In the class intervals 10-20, 20-30, the number 20 is included in:

(a) 10-20

(b) 20-30

(c) both the intervals

(d) none of these intervalsAnswer

Question 8.

A grouped frequency table with class intervals of equal sizes using 250-270 (270 not included in this interval) as one of the class interval is constructed for the following data:

268, 220, 368, 258, 242, 310, 272, 342, 310, 290, 300, 320, 319, 304,402, 318, 406, 292, 354, 278, 210, 240, 330, 316, 406, 215, 258, 236.

The frequency of the class 370-390 is:

(a) 0

(b) 1

(c) 3

(d) 5Answer

Question 9.

A grouped frequency distribution table with classes of equal sizes using 63-72 (72 included) as one of the class is constructed for the following data:

30, 32, 45, 54, 74, 78, 108, 112, 66, 76, 88, 40, 14, 20, 15, 35, 44, 66, 75, 84, 95, 96, 102, 110, 88, 74, 112, 14, 34, 44.

The number of classes in the distribution will be:

(a) 9

(b) 10

(c) 11

(d) 12Answer

Question 10.

To draw a histogram to represent the following frequency distribution:

the adjusted frequency for the class 25-45 is:

(a) 6

(b) 5

(c) 3

(d) 2Answer

Question 11.

The mean of five numbers is 30. If one number is excluded, their mean becomes 28. the excluded number is:

(a) 28

(b) 30

(c) 35

(d) 38Answer

Question 12.

If x¯ represents the mean of n observations x_{1}, x_{2}, …, x_{n}, then value of ∑ni=1(xi−x¯) is:

(a) -1

(b) 0

(c) 1

(d) n – 1Answer

Question 13.

If each observation of the data is increased by 5, then their mean

(a) remains the same

(b) becomes 5 times the original mean

(c) is decreased by 5

(d) is increased by 5Answer

Question 14.

Let x¯ be the mean of x_{1}, x_{2}, …, x_{n} and y the mean of y_{1}, y_{2}, …, y_{n}. If z is the mean of x_{1}, x_{2}, …. x_{n}, y_{1}, y_{2}, …, y_{n}, then z is equal to

(a) x¯+y¯

(b) x¯+y¯2

(c) x¯+y¯n

(d) x¯+y¯2nAnswer

Question 15.

If x¯ is the mean of x_{1}, x_{2}, …, x_{n}, then for a ≠ 0, the mean of ax_{1}, ax_{2}, …, ax_{n}, x1a, x2a, …….., xna is