Teachoo Quiz

Maths Statistics Class 11 MCQ and Assertion Questions

Short Quiz · Class 11 · Maths · CBSE

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Chapter 13 Class 11 Statistics | 5 questions | about 4 minutes

Practise Statistics Class 11 with Teachoo's Short Quiz (Class 11 · Maths · CBSE). Practise these questions in a free interactive quiz with answer feedback.

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Question 1 of 5
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Question 1 of 5
In step-deviation method with class width \(h = 10\), the standard deviation of step-deviations \(y_i\) is \(\sigma_y = 1.418\). Calculate the standard deviation \(\sigma_x\) of original data.
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Question 2 of 5
What is the variance of the first \(10\) natural numbers?
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Question 3 of 5
The mean of \(5\) observations is \(4.4\) and their variance is \(8.24\). If three observations are \(1, 2,\) and \(6\), calculate the product of the remaining two observations.
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Question 4 of 5
The standard deviation of \(x_1, x_2, \dots, x_n\) is \(\sigma_x = 6\). Calculate the standard deviation of \(y_i = -2x_i + 5\).
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Question 5 of 5
Group A (\(n_1 = 50, \bar{x}_1 = 60, \sigma_1^2 = 4\)) and Group B (\(n_2 = 50, \bar{x}_2 = 60, \sigma_2^2 = 9\)) are combined into a single dataset of \(100\) observations. Calculate the combined variance \(\sigma^2\).
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