# Estimation using Normal Distribution

A random sample of 55 adults in a certain country showed an average height of six feet (72 inches) for adults. Statistics show the population standard deviation to be 3.40 inches.

Calculate the 95% confidence interval for the mean height of the adult population.

https://brainmass.com/statistics/normal-distribution/estimation-using-normal-distribution-14484

#### Solution Preview

Mean= M = 72 inches

Standard deviation =s = 3.40 inches

sample size=n= 55

s x=standard error of mean=s / ...

#### Solution Summary

Population mean is estimated using normal distribution

$2.19