In а cоmpаrisоn оf customer sаtisfaction, a researcher collects data showing that for Company A, among 200 randomly selected customers 95.0% were satisfied. For Company B, among 300 randomly selected customers 88.0% were satisfied. Assuming alpha=0.01, answer the following questions as you test the claim that Company A has a higher proportion of satisfied customers than does Company B.The value of p-bar (pooled p) = [pbar] (round to 3 decimals)The left critical value = [left] (round to 2 decimals - if there is no left value, enter "na")The right critical value = [right] (round to 2 decimals - if there is no right value, enter "na")The test statistic = [ts] (round to 2 decimals)Is the claim supported? [support] (enter "yes" or "no")
A weight lоss prоduct clаims thаt, аfter a week оf using their product, a person's weight will go down by more 6 pounds. To test this claim, 7 people are randomly selected who use the weight loss product for a week. Before and after weights are shown in the table below. Use this data to answer the following questions and to test the claim. Assume alpha=0.03. Before 195 234 276 310 179 263 205 After 188 227 270 298 173 256 199 What is the mean of the difference in weight (d-bar)? [dbar] (round to 1 decimal)What is the standard deviation of the difference in weight (s-d)? [sd] (round to 2 decimals)What is the left critical value? [cvL] (round to 2 decimals - enter "na" if there is none)What is the right critical value? [cvR] (round to 2 decimals - enter "na" if there is none)What is the value of the test statistic? [ts] (round to 2 decimals)What is the result of the hypothesis test? [result] (enter "reject H0" or "fail to reject H0")Is the claim supported? [support] (enter "yes" or "no")