Question: a simple random sample of 20 new automobile models yielded...
|A simple random sample of
20new automobile models yielded the data shown to the right on fuel tankcapacity, in gallons.
a. Find a point estimate for the mean fuel tank capacity for all new automobile models. left parenthesis Note: Summation from nothing to nothing x Subscript i Baseline equals 350.9 right parenthesisNote: ∑xi=350.9
A point estimate is
(Type an integer or a decimal. Do not round.)
b. Determine a
confidence interval for the mean fuel tank capacity of all new automobile models. Assume
confidence interval is from
(Do not round until the final answer. Then round to two decimal places as needed.)