In a study conducted to investigate browsing activity by shoppers, each shopper was initially classified as a nonbrowser, light browser, or heavy browser. for each shopper, the study obtained a measure to determine how comfortable the shopper was in a store. higher scores indicated greater comfort. suppose the following data were collected.
nonbrowser light browser heavy browser
4 5 5
5 6 7
6 6 5
3 4 7
3 7 4
4 4 6
6 6 6
4 5 7
a) use a .05 level of significance to test for differences in comfort levels among the three types of browsers.