Suppose that in the population of chickens, the average number of feathers per chicken is 1000 with a standard deviation of 200. Suppose that I select a random sample of 64 birds from this population. What is the probability that this sample will have a mean of 950 feathers or fewer?

Question

Quizplus · Accepted Answer

The Answer is Standard error:

\sigma_{\bar{x}}=\frac{\sigma}{\sqrt{n}}

= 200/8 = 25
z = (950-1000)/25 = -2.00
Probability = .0228.

Suppose That in the Population of Chickens, the Average Number