Question 6 0.5 pts We perform a one-tailed test if _____ . O The null hypothesis is stated as an undirected inequality, e.g. H0 : 7r 76 0.16 O The null hypothesis is stated as an equality, e.g. H0 : 7r = 0.16 O The null hypothesis is stated as a directed inequality including equality, e.g. H0 : 1r 2 0.16 Question 9 1 pts If we perform a test of independence between two indicator variables (aka, a test of differences between two proportions), the null hypothesis is :Ap=0 :A'=0 Question 10 1 pts When conducting a test of independence between two indicator variables (aka, a test of differences between two proportions), we need to choose a single value for the null value of both samples' parameters 71'. Which value do we use for this null value? 0 ppooled 0 Pa O Pb