Researchers examine the relationship between church attendance and hours spent on homework each week for a random sample of 80 high school students. students were grouped into four categories based on frequency of church attendance: never attend, attend infrequently, attend frequently, attend very frequently. null hypothesis: for high school students, there is a no relationship between church attendance and hours spent on homework each week (i. e. the mean hours spent on homework each week are the same for the four populations defined by church-going frequency.) alternative hypothesis: for high school students, there is a relationship between church attendance and hours spent on homework each week (i. e. the mean hours spent on homework each week differ for the four populations defined by church-going frequency.) analysis of variance results: to check conditions for use of the anova f-test, we need to examine histograms of the homework hours for how many of the samples?