A survey researcher compares 4 religious groups on their attitudes toward education. 1200 subjects receive the survey and 823 respond. There are 10 items; the likert scale is 1-5. A high positive score indicates a more positive attitude. There are only 800 useable responses. The Protestants are split into two groups for analysis purposes. The group sizes along with the means are:

Protestant1 Catholic Jewish Protestant 2
n 238 182 130 250
_
x 32.0 33.1 34 31

An analysis of variance on these groups yielded F= 5.61, which is significant at the .001 level. Discuss the practical significance issue.