The time required to overhaul a heavy-duty truck engine is a normally distributed random variable. The repair times for a sample of 12 engines (in hours) selected at random are as follows: 16.3 15.4 17.3 15.5 15.9 16.7 16.2 16.7 18.2 16.9 17.4 18.0 Construct an interval for estimating population variance at the 95% confidence level.
The time required to overhaul a heavy-duty truck engine is a normally distributed random variable. The repair times for a sample of 12 engines (in hours) selected at random are as follows: 16.3 15.4 17.3 15.5 15.9 16.7 16.2 16.7 18.2 16.9 17.4 18.0 Construct an interval for estimating population variance at the 95% confidence level.
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 13PPS
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Transcribed Image Text:The time required to overhaul a heavy-duty truck engine is a normally distributed random
variable. The repair times for a sample of 12 engines (in hours) selected at random are as
follows:
16.3
15.4
17.3
15.5
15.9
16.7
16.2
16.7
18.2
16.9
17.4
18.0
Construct an interval for estimating population variance at the 95% confidence level.
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