Question

A consumer advocacy group feels that Walmart provides a less safe shopping environment than Target. To try to prove their point, they randomly selected 24 Walmart stores and found the annual number of crime reports filed for these stores. Each of these Walmart stores was then paired with a Target store within a 10 mile radius, and the annual crime reports for the associated Target stores were also recorded. The data is shown below. Test to to see if the mean number of crime incidents at Walmart stores is significantly larger than the mean number of crime incidents at Target stores. Please note the data shown below is not real, but if you would like to see the real example, check out walmartcrimereport.com. Unfortunately, the real data was collected in a way that was not fair to Walmart. Assume normality.

Walmart	Target
713	767
459	547
874	889
861	906
398	363
949	996
776	740
581	455
633	656
864	927
816	885
427	399
882	852
806	810
1213	1170
793	848
727	682
1064	1071
701	660
826	787
534	496
922	930
572	520
918	863

What is the test statistic? Give answer to four decimal places.

I tried 0.0629 and it's wrong

Answer 1