Question: A self-scan machine was recently installed at Giant Eagle.The store manager would like to know if the mean checkout time using the standard checkout method

A self-scan machine was recently installed at Giant Eagle.The store manager would like to know if the mean checkout time using the standard checkout method is longer than using the self-scan.She gathered the following information. She found from a sample of 39 standard checkout customers, their mean wait time was 5 minutes with a standard deviation of .5 minutes.For a sample of 46 self-scan customers their mean wait time was 4.6 minutes with a standard deviation of .56 minutes.Using a 5% significance level can we conclude the standard checkout has a longer wait?

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