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A sample of 150 visitors to a motorway service station caf, spent an average of 10.70 with a 2.03 sample standard deviation. Calculate the 95%

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A sample of 150 visitors to a motorway service station caf, spent an average of 10.70 with a 2.03 sample standard deviation. Calculate the 95% confidence interval for the population mean spend a. 10.38-11.02 b. 10.32-10.78 c. 10.55-10.88 d. 10.22-10.95

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