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(Solved): integrated circuits. Ten wafers were tested, and the fallowits photonedet thickness meanumonts (in a ...



integrated circuits. Ten wafers were tested, and the fallowits photonedet thickness meanumonts (in angations

x

, 000 ) were observed: 13-3997, 13-3957, 13-3902, 13-4045, 13-4005, 13, 9912, 13, 7985, 17, 3925, 13.3946, and 13-4002. a. Test the hypothesis that mean thickness is

13.4\times 1.900A

. Use

a=0.05

asi ancere a no-sided altrmative. b. Find a

99%

two-sided confidence intercal on mean photoresist thickness. Amome that thickess is sormuly distribeted. c. Does the sormality assumption seem reasonable for these data?



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