1.If X overbar=89, S=12, and n=49, and assuming that the population is normally distributed, construct a 99% confidence interval estimate of the population mean, ?.2. Assuming that the population is normally distributed, construct a 95% confidence interval for the population mean, based on the following sample size of n=7.1, 2, 3, 4, 5, 6, and 30Change the number 30 to 7 and recalculate the confidence interval. Using these results, describe the effect of an outlier (that is, an extreme value) on the confidence level.Find a 95% confidence interval for the population mean.3. A stationery store wants to estimate the mean retail value of greeting cards that it has in its inventory. A random sample of 121greeting cards indicates a mean value of $ 2.32 and a standard deviation of $ 0.31.a. Assuming a normal distribution, construct a 90 % confidence interval estimate of the mean value of all greeting cards in the store's inventory.
This question was answered on: Sep 21, 2023
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