A Survey of 85 company employees shows that the mean length of
the Christmas vacation was 4.5 days, with a standard deviation of
1.2 days.
Construct a 95% confidence interval for the population's
mean length of vacation.
( , )
Round your answer to two decimal digits
Construct a 92% confidence interval for the population's
mean length of vacation.
( , )
Round your answer to two decimal digits