Essay
A lathe is set to cut bars of steel into lengths of 6 centimeters. The lathe is considered to be in perfect adjustment if the average length of the bars it cuts is 6 centimeters. A sample of 121 bars is selected randomly and measured. It is determined that the average length of the bars in the sample is 6.08 centimeters with a standard deviation of 0.44 centimeters.
a.Formulate the hypotheses to determine whether or not the lathe is in perfect adjustment.
b.Compute the test statistic.
c.Using the p-value approach, what is your conclusion? Let = .05.
Correct Answer:
Verified
a.H0: 
= 6
Ha: 6
b.t ...View Answer
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Correct Answer:
Verified
= 6Ha:
6b.t ...
View Answer
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