# Confidence interval for mean

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In manufacturing process a random sample of 36 bolts manufactured has a mean length of 3 inches with a standard deviation of .3 inches.

What is the 99% confidence interval for the true mean length of the bolt?

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Basics and Confidence Intervals 3

In manufacturing process a random sample of 36 bolts manufactured has a mean length of 3 inches with a standard deviation of .3 inches.

What is the 99% confidence interval for ...

#### Solution Summary

Step by step method for computing confidence interval for mean is given in the answer.

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