Aa Aa 2. Interval estimation of a population mean, population standard deviation known The 2008 Workplace Productivity Survey, commissioned by LexisNexis and prepared by Worldone Research, included the question, "During the average workday, how many hours do you spend attending meetings?" Let x = the number of hours a legal professional spends attending meetings during a typical workday. Suppose that x is normally distributed with a known standard deviation of 3.6. A sample of 250 legal professionals was surveyed, and the sample's mean response was 2 hours. Use the sample information to estimate , the mean number of hours a legal professional spends attending meetings during a typical workday. and a standard The sampling distribution of x is normal with a mean deviation Use the following Distributions tool to develop a 95% confidence interval estimate of the mean number of hours a legal professional spends attending meetings during a typical workday. Select a Distribution Distributions o - . Use the following Distributions tool to develop a 95% confidence interval estimate of the mean number of hours a legal professional spends attending meetings during a typical workday. Standard Normal Mean = 0.0 Standard Deviation = 1.0 You can be 95% confident that the interval estimate to includes the population mean