In a study of income inequality in Los Angeles and Orange counties, researchers surveyed 100 households in each county and wanted to test the null hypothesis that the variance in household income was the same for these two counties. What type of statistical test should they use? O TMAX test OChi-squared test OF test Kolmogorov-Smirnov test OShapiro-Wilk test\fQuestion 95 2 pts Which of the following nonparametric tests is used to answer the following research question: "What is the exact likelihood of getting six heads on a toss of six coins?" O McNemar O Kolmogorov-Smirnov O the median test O Fisher's exactQUESTION 1 This scenario applies to Questions 14 to 15: A randomized experiment was done by randomly assigning each participant either to walk for half an hour three times a week or to sit quietly reading a book for half an hour three times a weak. At the end of a year the change in participants' blood pressure over the year was measured, and the change was compared for the two groups. This is a randomized experiment rather than an observational study because: The participants were randomly assigned to either walk or read, rather than choosing their own activity. O Blood pressure was measured at the beginning and and of the study. O The two groups were compared at the end of the study. O A random sample of participants was used