question 1

A random sample of 16 health maintenance organizations (HMOs) was selected. For each HMO, the copayment (in dollars) for a doctor's ofce visit was recorded. The results are as follows. 46, 39, 31, 29, 27, 39, 44, 57, 32, 44, 55, 45, 55, 26, 36, 38 i: Send data to calculator] Under the assumption that copayment amounts are normally distributed, find a 90% condence interval for the mean copayment amount in dollars. Give the lower limit and upper limit of the 90% condence interval. Cam.r your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.) Lower limit: 1: XS? Upper limit: Consider the following random sample of diameter measurements (in inches) of 9 softballs. 4.72, 4.86, 4.71, 4.71, 4.86, 4.69, 4.83, 4.87, 4.76 . Send datamcalcuiatorj If we assume that the diameter measurements are normally distributed, nd a 95% confidence interval for the mean diameter of a softball. Give the lower limit and upper limit of the 95% confidence interval. Cam.r your intermediate computations to at least three decimal places. Round your answers to two decimal places. (If necessary, consult a list of formulas.) Lower limit: I X \\(3 9 Upper limit: In a study of pain relievers, 25 people were given product A, and all but 7 experienced relief. In the same study, 100 people were given product B, and all but 36 experienced relief. Fill in the blanks below to make the most reasonable statement possible. Product (Choose one) performed better in the study. That is because only |% failed to get relief with this product, A B n. whereas % failed to get relief with Product (Choose one) A B n. .In a recent study, 100 males used a new weight-loss supplement, and all but 30 of them experienced weight loss after two weeks. In the same study, 50 females used the same supplement, and all but 11 of them experienced weight loss after two weeks. Fill in the blanks below to make the most reasonable statement possible. The new weight-loss supplement was more effective on (Choose one) In the study. That is because only |% of them males females failed to lose weight after two weeks, whereas | % of the (Choose one) failed to lose weight after two weeks. males females