One gallon of gas is put into each of 30 test cars. The resulting gas-mileage values of computed with mean of 28.5 gallons per mile, and standard deviation of 1.2 miles per gallon. What is the 95% confidence interval estimate of the mean mileage?
One gallon of gas is put into each of 30 test cars. The resulting gas-mileage values of computed with mean of 28.5 gallons per mile, and standard deviation of 1.2 miles per gallon. What is the 95% confidence interval estimate of the mean mileage?
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Transcribed Image Text:One gallon of gas is put into each of 30 test cars. The resulting gas-mileage values of the sample are
computed with mean of 28.5 gallons per mile, and standard deviation of 1.2 miles per gallon. What is the
95% confidence interval estimate of the mean mileage?
O (28.1, 28.9)
O (28.42, 28.58)
O (27.3, 29.7)
O (28.46, 28.54).
O(27.36, 29.64)
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