5) A bird hunter's society is interested in knowing whether three different brands of turkey calls are equally effective in attracting gobblers. Each turkey call is randomly assigned to five hunters, and the order of each experiment is also randomized. An experiment consists of a hunter using one brand three times and waiting fifteen minutes. The number of gobblers attracted by the calls is counted. The data are analyzed and calculations show an F-ratio of 7.878. Assuming that the conditions required for ANOVA are satisfied, what is the F critical value? What would you conclude? Use a = 0.05