The question is the screenshot. The two other graphs are a standard normal and t distribution

4 . 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 conducting online research?\" Let x = the number of hours a legal professional spends on online research during a typical workday. Suppose that x is normally distributed with a known standard deviation of 5. A sample of 250 legal professionals was surveyed, and the sample's mean response was 2.7 hours. Use the sample information to estimate p, the mean number of hours a legal professional spends on online research during a typical workday. The sampling distribution of)? is normal with a mean V and a standard deviation V . Use the following Distributions tool to develop a 99% confidence interval estimate of the mean number of hours a legal professional spends on online research during a typical workday. Select a Distribution v Di tribut ns