Oven thermostats were tested by setting them to 350°F and measuring the actual temperature of the oven. In a sample of 67 thermostats, the average temperature was 348.2°F and the standard deviation was 6.100°F. Find a 90% confidence interval for the mean oven temperature. (Round the final answers to three decimal places.)

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 14PPS
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Oven thermostats were tested by setting them to 350°F and measuring the actual temperature of the oven. In a sample of
67 thermostats, the average temperature was 348.2°F and the standard deviation was 6.100°F.
Find a 90% confidence interval for the mean oven temperature. (Round the final answers to three decimal places.)
Transcribed Image Text:Oven thermostats were tested by setting them to 350°F and measuring the actual temperature of the oven. In a sample of 67 thermostats, the average temperature was 348.2°F and the standard deviation was 6.100°F. Find a 90% confidence interval for the mean oven temperature. (Round the final answers to three decimal places.)
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