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Important Questions

Measures Of Central Tendency — Important Questions

ICSE · Class 11 · Economics

59 important questions from Measures Of Central Tendency for ICSE Class 11 Economics, with answers. Part of the ICSE Class 11 Economics syllabus.

59 questions40 flashcards8 formulas & key relations5 concepts

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59 Questions·
multiple choicemultiple correct

Important Questions from Measures Of Central Tendency

1multiple choice
3 marks

A mean of 48 was calculated for 100 observations. Later, one value was found to be 73 instead of 53. What is the correct mean?

Show answer

47.8

Original sum = 100 × 48 = 4800. Correct sum = 4800 - 73 + 53 = 4780. Correct mean = 4780/100 = 47.8.

2multiple choice
3 marks

A weighted mean is needed for values 10, 20, 30, 40 with weights 1, 2, 3, 4. What is the weighted arithmetic mean?

Show answer

30

Compute ΣWX = 10×1 + 20×2 + 30×3 + 40×4 = 10 + 40 + 90 + 160 = 300. Compute ΣW = 1 + 2 + 3 + 4 = 10. Weighted mean = 300/10 = 30.

3multiple choice
3 marks

A continuous series has frequencies 8, 15, 25, 32, 15, 5 in class intervals 0-10, 10-20, 20-30, 30-40, 40-50, 50-60. What is the median?

Show answer

30.625

Total frequency N = 100, so median position is N/2 = 50th item. Cumulative frequencies are 8, 23, 48, 80, 95, 100, so the median class is 30-40. Use M = L1 + (i/f)(m-c) = 30 + (10/32)(50-48) = 30 + 0.625 = 30.625.

4multiple choice
3 marks

A continuous series in descending order has median class 30-40, upper limit 40, class interval 10, frequency 32, median position 50, and preceding cumulative frequency 20. What is the median?

Show answer

30.625

For descending order, use M = L2 - (i/f)(m-c). Substitute values: M = 40 - (10/32)(50-20) = 40 - 9.375 = 30.625.

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Frequently Asked Questions

What are the important topics in Measures Of Central Tendency for ICSE Class 11 Economics?
Key topics in Measures Of Central Tendency include Meaning, Objectives, and Essentials of an Ideal Average, Arithmetic Mean, Weighted Arithmetic Mean and Charlier's Check, Median. Study these first, then practise questions on each for Class 11 exams.
How many important questions are there in Measures Of Central Tendency?
Super Tutor has 59 practice questions for Measures Of Central Tendency, including multiple choice, multiple correct questions. A sample with answers is on this page.

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