NCERT Example 9 - Statistics

Question: For x = 4, 8, 11, 17, 20, 24, 32 with frequencies 3, 5, 9, 5, 4, 3, 1, find variance and standard deviation.

Answer: Mean = 14, variance = 45.8, standard deviation approximately 6.77.

Full step-by-step NCERT solution with diagrams on Something by Zero.

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