A simple random sample of 60 items resulted in a sample mean of 80. The populationstandard deviation is s = 15.a. Compute the 95% confidence interval for the population mean.b. Assume that the same sample mean was obtained from a sample of 120 items. Providea 95% confidence interval for the population mean.c. What is the effect of a larger sample size on the interval estimate?

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.