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A sample of 100 visitors to a motorway service station caf, spent an average of 8.06 with a 1.54 sample standard deviation. Calculate the 95%

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A sample of 100 visitors to a motorway service station caf, spent an average of 8.06 with a 1.54 sample standard deviation. Calculate the 95% confidence interval for the population mean spend. a. 7.768.36 b. 7.72-8.76 c. 7.668.56 d. 7. 168.26

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