Students who get more sleep get better grades. You want to
estimate the hours of sleep per night that a college student gets.
You select 29 students; on average they slept 6.2 hours with a
standard deviation of 1.8 hours.
Used a t-distribution// standard error of 0.334// critical value
of 1.701
1. In order to be 90% confident of an estimate of the population
mean, what is the margin of error?
(Enter the value with three decimal places, using the form
#.###)
2. 90% confidence interval to estimate the population
mean; the lower bound is 5.631
What is the upper bound of a 95% confidence interval to estimate
the population mean? (Enter the value with three decimal places,
using the form #.###)