Assume that population mean is to be estimated from the sample described. Use the sample results to approximate the margin of error and 95% confidence interval.

Sample size,

n=64;

sample mean,

x=67.0 cm;

sample standard deviation,

s=4.0 cm

The margin of error is

(Round to one decimal place as needed.)

Find the 95% confidence interval.

(Round to one decimal place as needed.)