a study of the effectiveness of certain exercises m weight reduct10W a group of 15 persons engaged m these exercises for three months and showed the weights, in pounds, before exercises (-0 and aner exercises (D: (a) (b) (c) Individvnl Constmct a 95% "matched pairs" confidence interval (CL) to see if the data provide sufficient evidence to show a weight reductlon_ 'villat assumptions are required for this C.I. to be valid? Constmct a pooled No-sample t confidence intaval, treating the two samples as Independent, to see if the data provide suffcient evidence to show a weight reduction. unlat assumptions are required for this CL to be valid? Are the conclusions from (a) and (b) consistent, and why or why not?