A direct retailer that sells clothing on the Internet has two distribution centers and wants to determine if there is a difference between the proportion of customer order shipments that contain errors (wrong color, wrong size, etc.). It calculates a 95 percent confidence interval on the difference in the sample proportions to be -0.012 to 0.037. Based on this, it can conclude that the distribution centers differ significantly for the proportion of orders with errors.

Question

Quizplus · Accepted Answer

The confidence interval includes 0, which means there is no statistically significant difference between the proportions of order errors at the two distribution centers.

A Direct Retailer That Sells Clothing on the Internet Has