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A manufacturer produces both a deluxe and a standard model of an automatic sander designed for home use. Selling prices obtained from a sample of

A manufacturer produces both a deluxe and a standard model of an automatic sander designed for home use. Selling prices obtained from a sample of retail outlets follow:

Outlet 1 Deluxe price-39 Standard Price-27

Outlet 2 Deluxe price-39 Standard Price-29

Outlet 3 Deluxe price-46 Standard Price-35

Outlet 4 Deluxe price-38 Standard Price-31

Outlet 5 Deluxe price-40 Standard Price-30

Outlet 6 Deluxe price-39 Standard Price-35

Outlet 7 Deluxe price-35 Standard Price-29

  1. Calculate the value of the test statistic. If required enter negative values as negative numbers. (to 2 decimals).
  2. What is the 95% confidence interval for the difference between the mean prices of the two models (to 2 decimals)?

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