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.
Mean= M = 72 inches
Standard deviation =s = 3.40 inches
sample size=n= 55
s x=standard error of mean=s / ...
Population mean is estimated using normal distribution