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Does room temperature affect cognitive function A psychologist randomly divides 60 volunteers into two groups...

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Does room temperature affect cognitive function A psychologist randomly divides 60 volunteers into two groups One group of 30 solves a crossword puzzle in a room kept at 72 F the other group of 30 solves the puzzle in a room kept at 85 F The mean completion time x for the subjects in the cool room is 20 minutes and the standard deviation is S 6 minutes The mean x for the subjects in the warm room is 26 minute and the standard deviation is S2 8 minutes Let and 2 represent the mean completion times for all potential volunteers similar to the ones in this study when they are in cool or warm rooms respectively Using technology which of the following is a 99 confidence interval for Select one a 10 88 1 12 b 15 09 3 09 c 9 56 2 44 d 9 80 1 57 e 7 82 4 18

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