Eighty volunteers who read about a study in a newspaper were randomly assigned to be in the

Question:

Eighty volunteers who read about a study in a newspaper were randomly assigned to be in the experimental or control group. Within each group, participants were randomly assigned to one of four different conditions. Each participant then participated in the study individually. After this, each participant€™s status on the interval-level psychological variable was measured. Below are the means (and standard deviations).

(a) Evaluate all four assumptions and

(b) Decide if it is OK to proceed with the test.

II II 12.34 13.76 14.17 16.88 (2.89) (3.89) (4.95) (6.91) 16.99 (3.12) (4.18) (5.54) (6.48) IV Control Experimental 14.8