What is the sample standard deviation of satisfaction rating

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A restaurant would like to know how well its customers on average like a newly introduced soup. It asks four randomly selected customers to rate their satisfaction on a scale of 0 to 12, 12 being the best. Their responses are given in the table below.

Customer Satisfaction

1 8
2 2
3 5
4 10

(A) What is the sample standard deviation of satisfaction rating?

(B) What is the approximate standard error of the sample mean estimator for the population mean satisfaction rating?

(C) Based on the sample data above, what is the 95% confidence interval for the population mean satisfaction rating? The appropriate t-multiple is 3.18.

(D) Give a specific interpretation of the confidence interval you constructed in Part

Reference no: EM132864600

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