Determine the missing frequency in the following frequency distribution, when it is known that arithmetic mean = 11.0917 and total sample size N = 60?

Determine the missing frequency in the following frequency distribution, when it is known that arithmetic mean = 11.0917 and total sample size N = 60?

Expert Solution

Solution:

Calculate ∑fi (N=60) and ∑xifi as follows:

So, from above: f1 = 29 - f2; and ∑xifi = 352.5 + 10.5f₁+ 11f₂.

Replace f1 = 29 - f₂ in ∑xifi = 352.5 + 10.5f₁+ 11f₂ and proceed as follows:

Thus, the missing frequencies are

f1 = 12 and f₂= 17

The missing frequencies are

f1 = 12 and f₂= 17

Shams answered 2 years ago

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