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a) In a random sample of 15 local gas stations, the mean price per gallon (ppg) of regular gas is $2.64 with standard deviation $0.12.

a) In a random sample of 15 local gas stations, the mean price per gallon (ppg) of regular gas is $2.64 with standard deviation $0.12. To calculate a 95% Confidence interval for the mean ppg of regular gas for all stations in this area, select the appropriate z or t-score. k1 O A. t = 2.131 O B. Z= 1.96 O C. t= 2.145 O D. t = 1.761 Time Remaining: 00:41:54 Submit quiz

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