Posted by Devika on .
A random sample of size 81 is taken from a large population, measuring the time it takes to complete a driver’s license examination. The sample mean was found to be 43 minutes, and the sample standard deviation 5.71 minutes. Construct a 95% confidence interval around the sample mean.
95% = men ± 1.96 SEm
SEm = SD/√n
I'll let you do the calculations.