7. Do customers spend more money on a trip to Store 2 compared to Store 17 Suppose researchers interested in this questi

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7 Do Customers Spend More Money On A Trip To Store 2 Compared To Store 17 Suppose Researchers Interested In This Questi 1 (24.47 KiB) Viewed 16 times

7. Do customers spend more money on a trip to Store 2 compared to Store 17 Suppose researchers interested in this question collected a random sample from 85 customers of Store 1 and 80 Store 2 customers. The data collected are summarised in the table below Store 1 Store 2 n 85 80 2 $45 353 $21 $19 (a) (3 points) Calculate the degrees of freedom for the problem (b) (6 points) Construct 95% confidence interval for the difference in the average spent at each store. (e) (2 points) Interpret your confidence interval.