Students applying to graduate schools in many disciplines are required to take the Graduate Record Examination (GRE). An ambitious undergraduate student creates a study program that she believes will greatly increase students’ GRE scores, relative to the general population. She recruits a sample of 36 students believed to be representative of the larger undergraduate student population and puts them through the study program. Afterwards, they complete the GRE and receive a mean score of M = 1052. The GRE is normally distributed in the general population with a mean of μ = 1000 and a standard deviation of σ = 150. a) Using the data provided above, calculate and interpret the effect size, Cohen’s d. b) Given the results of the analysis and the associated effect size, do you think this study program was a very effective way to change GRE score outcomes? Why or why not?
Students applying to graduate schools in many disciplines are required to take the Graduate Record Examination (GRE). An ambitious undergraduate student creates a study program that she believes will greatly increase students’ GRE scores, relative to the general population. She recruits a sample of 36 students believed to be representative of the larger undergraduate student population and puts them through the study program. Afterwards, they complete the GRE and receive a mean score of M = 1052. The GRE is
a) Using the data provided above, calculate and interpret the effect size, Cohen’s d.
b) Given the results of the analysis and the associated effect size, do you think this study program was a very effective way to change GRE score outcomes? Why or why not?
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