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Mth – BASIC STATISTICS

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1

The sum of frequencies in a grouped frequency distribution is 50. The sum of the relative frequencies is:

A 0.02 B 0.5 C 1 D 50

2

The relative frequency of an event can be used to estimate:

A Mean B Probability C Median D Mode

3

The estimated probability based on experiments is called:

A Theoretical probability B Experimental probability C Subjective probability D Conditional probability

4

If the mean of 5 numbers is 8, what is their sum?

A 8 B 13 C 40 D 80

5

Find the median of the data: 12, 15, 18, 22, 25, 30.

A 20 B 18.5 C 22 D 19

6

The mean of 5 numbers is 12. If one number is removed, the mean becomes 10. What is the removed number?

A 20 B 18 C 15 D 22

7

In a frequency distribution, the class interval 10-20 has class mark:

A 10 B 15 C 20 D 30

8

What is the class width if the class interval is 10-19?

A 10 B 9 C 11 D 19

9

What is the mode of the data 5, 5, 6, 7, 8, 8, 8, 9?

A 8 B 5 C 6 D 9

10

The mode of a data set is always:

A Unique B One of the data values C Not in the data set D The largest value

11

A histogram is a graph that represents:

A Cumulative frequency B Frequency distribution C Relative frequency D Mean

12

What is the mean of the first 10 natural numbers?

A 5.5 B 5.0 C 6.0 D 10.0

13

What is the estimated probability based on relative frequency of an event that occurs 35 times in 200 trials?

A 0.175 B 0.35 C 0.25 D 0.20

14

In a histogram, the area of each rectangle is proportional to:

A The frequency of the class B The class width C The class midpoint D The cumulative frequency

15

What is the median of the data: 1, 3, 5, 7, 9, 11?

A 6 B 5.5 C 7 D 5

16

Two coins are tossed. What is the probability of getting exactly one head?

A 1/2 B 1/4 C 3/4 D 1/3

17

If each value in a data set is multiplied by 2, the new mean is:

A Halved B Doubled C Unchanged D Squared

18

What is the mode of the data set: 5, 5, 5, 7, 7, 8, 9?

A 5 B 7 C 8 D 9

19

What is the relative frequency of an event if it occurs 25 times out of 100 trials?

A 0.25 B 25 C 0.75 D 1.0

20

The weights (in kg) of 5 students are 45, 50, 55, 60, 65. What is the mean weight?

A 50 kg B 55 kg C 60 kg D 45 kg