Notation for hypothesis tests about a population mean Suppose you are conducting a study about how the average U. S. worker spends time over the course of a workday You are interested in how much time workers spend per day on personal calls, e-mails, and social networking websites, as well as how much time they spend socializing with coworkers versus actually working. varjables such as travel time to The most recent census provides data for the entire population of U. S. workers on work, time spent at work, and break time at work. The census, however, does not inctude are interested in, so you obtain a random sample of 102 full-time workers in the United States and ask about personal calls, e-mails, and so forth. You are curious about how your sample compares with the census, so you also ask the workers the same questions about work that are asked in the census. Suppose the mean travel time to work from the most recent census is 24.1 minutes, with a standard deviation of 4.5 minutes. Your sample of 102 U. S. workers provides a mean travel time to work of 24.5 minutes with a sample standard deviation of 6.2 minutes. " Organize this information by completing the following table. SM =