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Descriptive Statistics

CBSE · Class 11 · Applied Mathematics

Practice quiz for Descriptive Statistics — CBSE Class 11 Applied Mathematics. MCQs and questions with answers to test your preparation.

44 questions24 flashcards5 concepts

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Quick Quiz: Descriptive Statistics

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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?

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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

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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

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Frequently Asked Questions

What are the important topics in Descriptive Statistics for CBSE Class 11 Applied Mathematics?
Descriptive Statistics covers several key topics that are frequently asked in CBSE Class 11 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Descriptive Statistics — CBSE Class 11 Applied Mathematics?
Understand the core concepts first, then work through the 44 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

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

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