A random sample of n 16 school children yielded the followi

A random sample of n = 16 school children yielded the following data on their weight (lbs): and sample standard deviation s = 10. At a confidence level of 86%, calculate the margin of error in the estimate of the mean weight of this population of school children.

Solution

n =16

x bar = 105

Std dev = 10

Std error = 10/rt 16 = 10/4 = 2.5

Margin of error = z alpha/2 (std error)

= 1.48(2.5)

= 3.7