PROBLEM 1 (25 points): A company claims that cancer patients using drug X will live at least :8 more years. 3:25 X: 8.5 years = 1.5 year a) Test at U=.01 b) Give the CIE at 95% PROBLEM 2 (10 points): A company manufactures wind turbines. A random sample of 25 turbines is taken and the sample- mean life is 20.00 years with a standard deviation of 2.50 years. If you were constructing 395% :two_-._ sided condence interval estimate, the upper limit would be: ' " - PROBLEM 3 (15 points): The Fresh Springs Company claims that there is less than 1 ppm (parts per million) of benz'. their water. Test at alpha =.10 ' 11:25 - . IX: 1.10 ppm 5 '" .20 ppm _ ROBLEM 4 (10 points)