Find the mean and standard deviation using short-cut method.

Question

Philoid · Accepted 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