Using the data in Chapter 15 Data Set 2 (ch15ds2.csv) and R, compute the F ratio for a comparison among the three levels representing the average amount of time that swimmers practice weekly (<15, 15–25, and >25 hours), with the outcome variable being their time for the 100-yard freestyle. Answer the question of whether practice time makes a difference. Don’t forget to use the Options feature to get the means for the groups.