In a manufacturing process a random sample of 49 bolts

Reference no: EM13618380

In a manufacturing process a random sample of 49 bolts manufactured has a mean length of 1.24 inches with a standard deviation of .07 inches.use a normal disribution or a t-distribution to construct a 80% confidence interval for the mean.

A. Which distribution should be used to construct the 80%confidence level?

B. The 80% confidence interval is (?- , -?-) (round to two decimal places.)

Reference no: EM13618380

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