Essay
A lathe is set to cut bars of steel into lengths of 6 cm. The lathe is considered to be in perfect adjustment if the average length of the bars it cuts is 6 cm. 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 cm. The population standard deviation is 0.44 cm. Determine whether or not the lathe is in perfect adjustment. Use a .05 level of significance.
Correct Answer:
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H0: ? = 6
Ha: ? ? 6 z = 2; there...View Answer
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Correct Answer:
Verified
Ha: ? ? 6 z = 2; there...
View Answer
Unlock this answer now
Get Access to more Verified Answers free of charge
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