.A psychology professor believes that teaching students the active recall method influences students' grades at the end of the course. He takes a sample of 20 students and teaches them this method and how to apply it. The average score for this sample is M = 568. The population of students typically has a normal distribution with 400 and = 100.

a) Can the professor conclude that the students who apply this method obtain results significantly higher than those of the population? Use a one-sided test with .01.

b) Calculate Cohen's d to estimate the effect size.

c) write a sentence demonstrating how the results of hypothesis testing and effect size measurement would appear in a research report.

Answer rating: 100% (QA)

a To determine if the scores obtained by students who apply the active recall method are significantly higher than the population we can conduct a onesample onetailed ttest Given Sample Mean M 568 Population Mean 500 Population Standard Deviation 100 Sample Size n 20 Significance Level 001 onetailed Null Hypothesis H0 500 There is no significant ... View the full answer