Answer Happy

clinic offers a weight-loss program. The table below gives the amounts of weight loss, in pounds, for a random sample of 20 of its clients at the conclusion of the ogram. Assume that the data are normally distributed. Complete parts (a) and (b). 11 17 20 16 25 17 13 23 14 20 26 15 5 12 18 15 5 10 8 24 Find a 90% confidence interval for the population mean. to an upper limit of The 90% confidence interval is from a lower limit of (Round to two decimal places as needed.) b. Without doing the calculations, explain whether a 95% confidence interval for the population mean would be wider than, narrower than, or the same as that found in part (a). Choose the correct answer below. O A. It will be narrower because the reliability factor will be smaller for a 95% confidence interval than for a 90% confidence interval. OB. It will be the same because the confidence interval is being calculated for the same data set. OC. It will be narrower because the reliability factor will be larger for a 95% confidence interval than for a 90% confidence interval. OD. It will be wider because the reliability factor will be larger for a 95% confidence interval than for a 90% confidence interval.