Mathematics, 30.06.2020 15:01 shainaanderson24
A researcher has noted that the repair times of a sample of 15 new lawn mowers has a standard deviation of 4 minutes. A 95% confidence interval estimate for the variance of service times for all its new lawn mowers is:
a) 8.58 to 39.79
b) 1.64 to 1.96
c) 4 to 16
d) 4 to 15
Answers: 2
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A researcher has noted that the repair times of a sample of 15 new lawn mowers has a standard deviat...
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