Question: A sample of 100 items has a population standard deviation of 5.1 and a mean of 21.6. Find a 95 percent confidence interval for .What

A sample of 100 items has a population standard deviation of 5.1 and a mean of 21.6. Find a 95 percent confidence interval for .What is thelower endof the interval?

Present your answer as a number withone decimal.

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