Answer :
Let the assumed mean, A = 92.5 and h = 5
We obtain the following table from the given data:
We know that Mean,
∴
We know that Variance σ2 =
∴ σ2 =
We know that Standard Deviation = σ
∴ σ = √105.583 = 10.275
Ans. Mean = 93, Variance = 105.583 and Standard Deviation = 10.275
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