Required information One step in the manufacture of a certain metal clamp involves the drilling of four holes. In a sample of 150 clamps, the average time needed to complete this step was 74 seconds and the standard deviation was 13 seconds. Find a 90% confidence interval for the mean time needed to complete this step. (Round the final answers to three decimal places.)
Required information One step in the manufacture of a certain metal clamp involves the drilling of four holes. In a sample of 150 clamps, the average time needed to complete this step was 74 seconds and the standard deviation was 13 seconds. Find a 90% confidence interval for the mean time needed to complete this step. (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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Transcribed Image Text:Required information
One step in the manufacture of a certain metal clamp involves the drilling of four holes. In a sample of 150 clamps, the
average time needed to complete this step was 74 seconds and the standard deviation was 13 seconds.
Find a 90% confidence interval for the mean time needed to complete this step. (Round the final answers to three decimal places.)
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