8. A sample of 16 gas stations shows that the mean price for regular gasoline is x= $3.25. It is known that the standard deviation is o = $.08. a. Find a 95% confidence interval. b. If we had used a 99% confidence interval, what effect if any would this have on the length of the confidence interval.
8. A sample of 16 gas stations shows that the mean price for regular gasoline is x= $3.25. It is known that the standard deviation is o = $.08. a. Find a 95% confidence interval. b. If we had used a 99% confidence interval, what effect if any would this have on the length of the confidence interval.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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