10. Based on the conventions for ƞ2 effect sizes the effect for Darren’s study would be considered ___________.

Dan got a 60 on his social psych exam. The class average was 70 with SD = 4. Chris got an 80 on his cognitive psych exam. The class average was 95 with SD = 6. Who did better, compared to the rest of his class?

Continuing to be interested in satisfaction, we ran a separate study to see how satisfied MSU students were with three classes: statistics, personality psychology, and social psychology with 14 students sampled in each condition. Below are the means and the ANOVA table.   SS df MS F Between 81.33 2 40.67 10.65 Within 148.79 39 3.82   Total 230.12 41    

10i. Write your results in APA format. (4pts) 

10c. Using α = .05, what is the critical value of the test statistic? (4pts)

9e. Calculate the t-value. (4pts)

21h. Write a conclusion sentence and be sure to report your statistic at the end. State whether the effect size calculated in 21g is a small, medium, or large effect size. (5pts)

3. I collect 64 recent graduates from MS State and ask them how satisfied they are with their education. I am interested to compare whether their satisfaction is different from 80 (our benchmark for satisfaction). The sample had a mean of 75 and a standard deviation of 15. What is the t-value (AKA tobt) for this test? (4 pts)  

Independent Samples T-Test (28 pts) It takes a history of strong academic performance to be accepted into most honor’s colleges. Students in honor’s colleges are often able to take smaller classes, have more access to professors, and more access to research that may actually increase student performance. Mimicking a (real) experiment conducted in Nigeria regarding government grants, a researcher randomly assigned 10 students to be included in an honor’s college and 10 students who were not included in an honors college. To the right are the (fake) results of students’ GPAs after their freshman years.

9b. Using α = .05, what is the critical value of the test statistic? (4pts) df = [df] tcrit = [tcrit]