Q. 63.8( 33 Votes )

Find the mean and

Answer :

Let the assumed mean, A = 64 and h = 1


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 = √2.86 = 1.691


Ans. Mean = 64 and Standard Deviation = 1.691


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