Dr. X would like to examine the relative effectiveness of twoteaching methods for improving college students’ statisticalskills. A control group in which students received no training isalso included in the study. A sample of 30 college students israndomly selected from the subject pool. These individuals are thenrandomly assigned to one of the three teaching methods. Thedependent variable is a measure of statistical skills after onesemester.

control	method a	method b
8	20	9
7	17	8
6	12	8
8	16	6
5	18	7
6	19	10
9	17	6
7	16	8
6	18	7
6	17	8

1. Specify a research hypothesis (2 pts)

2. Specify a null hypothesis (2 pts )

3. Create the dataset according to the observations above andread it into R. In your original dataset, the categorical variablemay contain a set of values. Relabel the categorical variable withcorresponding labels (see descriptions above) by forming a newvariable. To demonstrate your work, show the R scripts, thevariable names, and the first 3 rows of your data. (10 pts)

4. Calculate the means and standard deviations of each group.Answer this question with R. To show your work, copy and paste theR-script and output below. (5 pts)

5. Compute the F-statistic and effect size with R. To show yourwork, copy and paste the R-script and output below. (5 pts)

6. Based on the calculation of F, make a decision whether rejector do not reject the null hypothesis. (2 pts)

7. Based on the calculation of F, perform post-hoc analyses withR if necessary. Briefly summarize your findings. (5 pts)8. Reportyour findings in APA format. (5 pts).