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A random sample of thirty-six 200-meter swims has a mean time of 3.009 minutes. The population...

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Basic Math

A random sample of thirty-six 200-meter swims has a mean time of3.009 minutes. The population standard deviation is 0.080 minutes.A 90?% confidence interval for the population mean time is(2.987,3.031).

Construct a 90?% confidence interval for the population meantime using a population standard deviation of 0.04 minutes. Whichconfidence interval is? wider? Explain.

Answer & Explanation Solved by verified expert
4.1 Ratings (629 Votes)
The formula for estimation is M ZsMwhereM sample meanZ Z    See Answer
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