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. Light Heavy Nonbrowser Browser Browser 9 10 3 10 11 5 11 10 3 8 9 5 8 12 2 9 9 4 10 11 3 9 10 5 a. Use to test for a difference among mean comfort scores for the three types of browsers.