The winning times (in seconds) of women in 100-meter dash for consecutive summer Olympic games are listed below. Assume that the times are sample data from a larger population: 11.07 11.08 11.06 10.97 10.54 10.82 10.94 10.75 10.93
Use the sample data above to test the claim that the mean winning time is less than 11 seconds (use 5% significance level). What can we conclude about winning times in the future?