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Important Questions

Correlation

ICSE · Class 11 · Economics

Most important questions from Correlation for ICSE Class 11 Economics board exam 2026. MCQs, short answer, and long answer questions with marks.

64 questions40 flashcards5 concepts

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64 Questions·
multiple choicetrue falsemultiple correct

Sample Questions

1multiple choice
3 marks

A rank-correlation problem has tied groups of sizes 3, 2, and 2. The uncorrrected sum of squared rank differences is \sum D^2 = 41 and N=10. What is the corrected rank correlation coefficient?

Show answer

0.73

Add the tie adjustments: (1/12)(3^3 - 3) = 2, and each (1/12)(2^3 - 2) = 0.5. Total adjustment = 3. So corrected sum = 41 + 3 = 44. Then r = 1 - [6 x 44] / [10(100 - 1)] = 1 - 264/990 = 0.73.

2multiple choice
3 marks

A linear relation is written as y = a + bx. If the intercept is 12 and the slope is 4, what is the value of y when x = 7?

Show answer

40

Substitute into y = a + bx. So y = 12 + 4 x 7 = 12 + 28 = 40.

3multiple choice
3 marks

Two variables have covariance C=18, standard deviations \sigma_x = 3 and \sigma_y = 6. What is Karl Pearson's coefficient of correlation?

Show answer

1

Use r = C / (sigma_x sigma_y). So r = 18 / (3 x 6) = 18 / 18 = 1. Covariance has a unit, but r is unit-free.

4multiple choice
3 marks

A data set gives \sum x y = 24, \sum x^2 = 36, and \sum y^2 = 64. What is the direct-method value of r?

Show answer

0.50

Use r = sum xy / sqrt(sum x^2 x sum y^2). Thus r = 24 / sqrt(36 x 64) = 24 / 48 = 0.50.

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Frequently Asked Questions

What are the important topics in Correlation for ICSE Class 11 Economics?
Correlation covers several key topics that are frequently asked in ICSE 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 Correlation — ICSE Class 11 Economics?
Understand the core concepts first, then work through the 64 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
How many important questions are there in Correlation?
There are 64 practice questions available for Correlation. These cover multiple question types including MCQs, short answer, and long answer questions.

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

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