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Descriptive Statistics — Practice Quiz

CBSE · Class 11 · Applied Mathematics

Try a 4-question quiz on Descriptive Statistics for CBSE Class 11 Applied Mathematics: tap an answer to check it and see why.

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Quick Quiz: Descriptive Statistics

0/4

Tap an answer to check it instantly. No sign-up needed for these 4.

1

Find the mean of the data set: 12, 15, 18, 20, 25, 30, 35

2

Calculate the median for the frequency distribution: Values: 10, 20, 30, 40, 50; Frequencies: 2, 5, 8, 3, 2

3

Find the mode of the data: 5, 7, 5, 9, 5, 12, 7, 5, 9

4

Calculate the range of the data set: 25, 30, 18, 42, 35, 28, 45

44 Questions·
multiple choicemultiple correct

Sample Questions

1multiple correct

For the data set 3, 7, 9, 12, 15, which of the following are correct?

Show answer

Median = 9, Mean = 9.2, Range = 12

Median (middle value) = 9. Mean = (3+7+9+12+15)/5 = 46/5 = 9.2. Range = 15-3 = 12. There is no mode as all values appear once.

2multiple choice

For the data 4, 6, 8, 10, 12, find the first quartile (Q1)

Show answer

6

For n=5, Q1 position = (5+1)/4 = 1.5, which means Q1 is between 1st and 2nd values. Q1 = (4+6)/2 = 5. Wait, let me recalculate: Q1 position = 1.5th position = 1st value + 0.5(2nd-1st) = 4 + 0.5(6-4) = 6

3multiple correct

Which of the following statements about standard deviation are correct?

Show answer

It is always non-negative, It measures spread of data, It is the square root of variance

Standard deviation is always ≥ 0, measures how spread out data is from the mean, and equals √variance. It cannot be negative as it's derived from squared deviations.

4multiple choice

Calculate the variance for the data: 2, 4, 6, 8, 10

Show answer

8

Mean = (2+4+6+8+10)/5 = 6. Variance = [(2-6)² + (4-6)² + (6-6)² + (8-6)² + (10-6)²]/5 = [16+4+0+4+16]/5 = 40/5 = 8

+40 more questions on Descriptive Statistics (CBSE Class 11 Applied Mathematics)

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Frequently Asked Questions

What are the important topics in Descriptive Statistics for CBSE Class 11 Applied Mathematics?
Key topics in Descriptive Statistics include Types of Data and Data Sources, Data Measurement Scales, Data Representation and Visualization, Measures of Central Tendency. Study these first, then practise questions on each for Class 11 exams.
How many practice questions are there for Descriptive Statistics?
There are 44 questions on Descriptive Statistics. Try the 4-question sample quiz on this page first; each answer shows an explanation when you tap it.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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