A pipes manufacturer makes pipes with a length that is supposed to be 11 inches. A quality control technician sampled 40 pipes and found that the sample mean length was 11.06 inches and the sample standard deviation was 0.27 inches. The technician claims that the mean pipe length is not 11 inches. What type of hypothesis test should be performed? [Select What is the test statistic? Ex: 0.123 What is the number of degrees of freedom? Ex: 20 Does sufficient evidence exist at the a = 0.05 significance level to support the technician's claim? Select ✓

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ision Making home > 5.2: Hypothesis test for a population mean
ypothesis test for a population mean.
ote:
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A pipes manufacturer makes pipes with a length that is supposed to be 11
inches. A quality control technician sampled 40 pipes and found that the
sample mean length was 11.06 inches and the sample standard deviation was
0.27 inches. The technician claims that the mean pipe length is not 11 inches.
What type of hypothesis test should be performed? Select
What is the test statistic? Ex: 0.123
What is the number of degrees of freedom? Ex: 20
Does sufficient evidence exist at the a = 0.05 significance level to support the
technician's claim? Select
Check
t
Next
MESA 81101
2
hp
3
Transcribed Image Text:ision Making home > 5.2: Hypothesis test for a population mean ypothesis test for a population mean. ote: 1295 Jump to level 1 A pipes manufacturer makes pipes with a length that is supposed to be 11 inches. A quality control technician sampled 40 pipes and found that the sample mean length was 11.06 inches and the sample standard deviation was 0.27 inches. The technician claims that the mean pipe length is not 11 inches. What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.123 What is the number of degrees of freedom? Ex: 20 Does sufficient evidence exist at the a = 0.05 significance level to support the technician's claim? Select Check t Next MESA 81101 2 hp 3
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