Mathematics, 16.12.2020 18:20 tyreannag7696

Scores on a certain test are normally distributed with a variance of 43. A researcher wishes to estimate the mean score achieved by all adults on the test. Find the sample size needed to assure with 98 percent confidence that the sample mean will not differ from the population mean
by more than 2 units.

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Scores on a certain test are normally distributed with a variance of 43. A researcher wishes to esti...