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Measures Of Central Tendency — Practice Quiz

ICSE · Class 11 · Economics

Try a 4-question quiz on Measures Of Central Tendency for ICSE Class 11 Economics: tap an answer to check it and see why.

59 questions40 flashcards8 formulas & key relations5 concepts

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Quick Quiz: Measures Of Central Tendency

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1

A series has five values: 20, 30, 40, 50, and 60. What is the arithmetic mean of the series?

2

A worker’s daily wages are 1000, 1200, 1400, 1600, 1800, 2000, and 2200 rupees. Find the arithmetic mean wage.

3

Two groups have 30 items with mean 42 and 20 items with mean 35. What is the combined mean?

4

Three groups have sizes 20, 30, and 50 with means 40, 35, and 30. What is the combined mean?

59 Questions·
multiple choicemultiple correct

Sample Questions

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 practice questions are there for Measures Of Central Tendency?
There are 59 questions on Measures Of Central Tendency. Try the 4-question sample quiz on this page first; each answer shows an explanation when you tap it.

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

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