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Statistics — CBSE Class 11

Master Statistics for CBSE Class 11. Free verified step-by-step solutions, 1 past exam problems, formulas, and markschemes.

Exam Questions & Step-by-Step Markschemes (1 Problems)

Question 1 • 2024 5 Marks

          Find the mean and variance for the following frequency distribution: x_i : 6, 10, 14, 18, 24, 28, 30 f_i : 2, 4, 7, 12, 8, 4, 3
        

Answer: \text{Mean } = 19, \quad \text{Variance } = 43.4

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