SAT, 12.01.2022 16:00 farashka03
A lathe is set to cut steel bars and considered to be in perfect adjustment if the average length of the bars it cuts is 7 cm. A sample of 31 bars is selected randomly and the length are measured. It is determined that the average length of the bars in the sample is 7. 055 cm with a standard deviation of 0. 35 cm. Find a 97% confidence interval that the average length of the bars is in perfect adjustment.
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A lathe is set to cut steel bars and considered to be in perfect adjustment if the average length of...
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