I really need some help with this problem ASAP. Here is the problem word-for-word:
Find the 90% confidence interval for the mean, variance, and standard deviation for the price in dollars of an adult single-day lift ticket. The data represent a selected sample of nationwide ski resorts. Assume the variable is normally distributed.
$59 $54 $53 $52 $51
$39 $49 $46 $49 $48