Short Quiz

Question 1 of 5

NCERT Exemplar

Consider the data :

Class	65-85	85-105	105-125	125-145	145-165	165-185	185-205
Frequency	4	5	13	20	14	7	4

The difference of the upper limit of the median class and the lower limit of the modal class is

A 0 B 19 C 20 D 38

Select one option. Answers are shown after the test.

Question 2 of 5

CBSE Board Exam 2026

The class mark of the median class of the following data is :

Class Interval	10-25	25-40	40-55	55-70	70-85	85-100
Frequency	2	3	7	6	6	6

A 40 B 55 C \(47.5\) D \(62.5\)

Select one option. Answers are shown after the test.

Question 3 of 5

NCERT Exemplar

The times, in seconds, taken by 150 atheletes to run a 110 m hurdle race are tabulated below :

Class	13.8-14	14-14.2	14.2-14.4	14.4-14.6	14.6-14.8	14.8-15
Frequency	2	4	5	71	48	20

The number of atheletes who completed the race in less then 14.6 seconds is :

A 11 B 71 C 82 D 130

Select one option. Answers are shown after the test.

Question 4 of 5

In statistics, an outlier is a data point that differs significantly from other observations of a data set.

If an outlier is included in the following data set, which measure(s) of central tendency would change?

12, 15, 22, 44, 44, 48, 50, 51

A only mean B only mean and median C all - mean, median, mode D (cannot be said without knowing the outlier.)

Select one option. Answers are shown after the test.

Question 5 of 5

NCERT Exemplar

In the following distribution :

Monthly income range (in Rs)	Number of families
Income more than Rs 10000	100
Income more than Rs 13000	85
Income more than Rs 16000	69
Income more than Rs 19000	50
Income more than Rs 22000	33
Income more than Rs 25000	15

the number of families having income range (in Rs) 16000-19000 is

A 15 B 16 C 17 D 19

Select one option. Answers are shown after the test.

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