## Stat 2300 In A Holiday Email Promotion Targeted To Cancelled

In a holiday email promotion targeted to cancelled customers, Illy Caffe found that for 20,000 customers there were 672 responses and an average purchase size of \$59. 36 with a standard deviation of411. 91. a. Construct a 98% confidence interval for the response rate. b. Construct a 98% confidence interval for the average purchase size. Illy Caffe would like to use the information flowing from the confidence intervals above into the same promotion next year. Please provide a discussion of how these intervals will be used.

## STAT 2300 In a holiday email promotion targeted to cancelled

Question
In a holiday email promotion targeted to cancelled customers, Illy Caffe found that for 20,000 customers there were 672 responses and an average purchase size of \$59.36 with a standard deviation of

411.91.

a. Construct a 98% confidence interval for the response rate.

b. Construct a 98% confidence interval for the average purchase size.

Illy Caffe would like to use the information flowing from the confidence intervals above into the same promotion next year. Please provide a discussion of how these intervals will be used.