Mathematics, 05.08.2021 16:20, mandy9386

Scores on a certain test are normally distributed with a variance of70. A researcher wishes to estimate the meanscore achieved by all adults on the test. Find the sample size needed to assure with 95 percent confidence thatthe sample mean will not differ from the population mean by more than2 units.

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Scores on a certain test are normally distributed with a variance of70. A researcher wishes to estim...

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