Question

In: Statistics and Probability

2. A company recently opened two supermarkets in different areas. Management wanted to know if the...

2. A company recently opened two supermarkets in different areas. Management wanted to know if the average sales per day for the two supermarkets was different. A 35-day sample for Supermarket A produced an average daily sales of $ 53,700, with a standard deviation of $ 2,900. A 30-day sample for Supermarket B produced an average daily sales of $ 58,450, with a standard deviation of $ 3,100.

to. Build a 96% confidence interval to estimate the difference between the average daily sales for the two supermarkets.
b. Test at a 5% significance level if the average daily sales for the two supermarkets are different.
c. Interpret the conclusion obtained in part b.

Solutions

Expert Solution

Let denote the average daily sales of Supermarket A and Supermarket B respectively.

a)

b)

orchestra answered 1 year ago
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