Q1) There are 3 hospitals in Tulsa, Oklahoma, area. Following data illustrate the number of outpatient surgeries carried out at each hospital last week. At.05 significance level, can we conclude there is a difference in mean number of surgeries performed by hospital or by day of week?

Q2) Clark Heter is industrial engineer at Lyons Products. He would like to find out whether there are more units produced on afternoon shift than on day shift. A sample of 54 day-shift workers showed that mean number of units produced was 345, with standard deviation of 21. A sample of 60 afternoon-shift workers illustrated that mean number of units produced was 351, with standard deviation of 28 units. At the .05 significance level, is the number of units produced on the afternoon shift larger?