Construct the confidence interval.
Requires either the use of t distribution or the normal distribution.
Hospital costs for accident victims who wore seatbelts. 20 randomly selected cases have a distribution that appears to be bell-shaped with a mean of $9004 and a standard deviation of $5629. Construct the 99% confidence interval for the mean of all such costs.© BrainMass Inc. brainmass.com December 24, 2021, 4:56 pm ad1c9bdddf