Question

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
	5	4	6
	6	5	8
	7	4	6
	4	3	8
	4	6	5
	5	3	7
	6	5	6
	5	4	8

a. Use 0.05 to test for a difference among mean comfort scores for the three types of browsers.

Compute the values identified below (to 2 decimals, if necessary).

Sum of Squares, Treatment
Sum of Squares, Error
Mean Squares, Treatment
Mean Squares, Error

Calculate the value of the test statistic (to 2 decimals, if necessary).

b. Use Fisher's LSD procedure to compare the comfort levels of nonbrowsers and light browsers. Use 0.05.

Compute the LSD critical value (to 2 decimals).

Answer 1

b)

Fisher's (LSD) for group i and j = (tN-k)*(sp*√(1/ni+1/nj)= 1.1