Prior to assessment of the outcome, the researchers did a manipulation check. Members of Groups 1 and 2 rated the attractiveness (on a 1 to 9 scale, with 9 being the most attractive) of the person in the photo. They reported that for the attractive photo, M = 7.53; for the unattractive photo, M = 3.20, F (1, 108) = 184.29. Was this difference statistically significant (using a =.05)? Question. Group 1: Attractive phote, M = 2.80 Group 2: Unattractive photo, M = 5.20 Group 3: No photo, M = 5.10 They did not reportt a single overall F comparing all groups; instead, they reported selected pairwise comparisons. For Group 1 versus Group 2, F(1,108) =6.60, p<.025. was the significance statistically significant? If they had done an overall F to assess the significance of differences of means among all three groups, do you think this overall F would have been statistically significant? Was the difference in mean length of sentence in part in the predicted direction? Calculate and interpret an effect-size for this obtained F
Prior to assessment of the outcome, the researchers did a manipulation check. Members of Groups 1 and 2 rated the attractiveness (on a 1 to 9 scale, with 9 being the most attractive) of the person in the photo. They reported that for the attractive photo, M = 7.53; for the unattractive photo, M = 3.20, F (1, 108) = 184.29. Was this difference statistically significant (using a =.05)?
Question.
Group 1: Attractive phote, M = 2.80
Group 2: Unattractive photo, M = 5.20
Group 3: No photo, M = 5.10
They did not reportt a single overall F comparing all groups; instead, they reported selected pairwise comparisons. For Group 1 versus Group 2, F(1,108) =6.60, p<.025. was the significance statistically significant? If they had done an overall F to assess the significance of differences of means among all three groups, do you think this overall F would have been statistically significant?
Was the difference in mean length of sentence in part in the predicted direction?
Calculate and interpret an effect-size for this obtained F
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