It has long been assumed that the normal body temperature fo

It has long been assumed that the normal body temperature for humans is 98.6° F. A random sample of 20 healthy men and 14 healthy women had their temperatures taken at 8:00 a.m. The data is on the front page of the exam in the table Human Body Temperatures.
Estimate the mean temperature for all males using a 95% confidence interval.

Solution

First find mean and std dev of 20 males

Mean = 97.84

and std dev =0.52154

Std error = 0.52154/rt20

= 0.11662

Margin of error = 1.96*011662

=0.229

Conf int lowerbound = 97.84-0.229 = 97.61

Upper bound = 98.07

(97.6, 98.1) is the right answer