Use either method of hypothesis testing to test the given claim about the means of two populations. Assume that two dependent samples have been randomly selected from normally distributed populations. 4) The table below shows the weights of seven subjects before and after following a particular diet for two months. Subject A B D E F G Before 178 167 194 154 After 171 158 192 159 160 158 182 a.) Using a 0.01 level of significance, test the claim that the diet is effective in reducing weight. b.) Construct a 98% confidence interval. What does the interval suggest? 174 156 194