6. The 23 members of an art appreciation class are asked to evaluate an anonymous painting, giving it a composite score derived from several recently studied measures of quality. Of the class members, 11 are exposed to no initial input, while the other 12 receive some indirect communications suggesting that the painting has been given favorable commentary by outside critics. Test the appropriate null hypothesis using the .05 level of significance.
No initial input
22
29
31
25
23
28
30
28
24
29
33
n = 11
Indirect communication
28
26
34
36
31
29
28
33
30
35
31
36
n = 12
a. State the hypotheses
b. Set the criterion for rejecting Ho
c. Compute the test statistic
d. Interpret the results