Econometrics is one of the most difficult undergraduate courses at Western Unive

Question

Econometrics is one of the most difficult undergraduate courses at Western University. To assist students in this course, school officials have developed four support services: peer tutoring, online discussion, group workshops, and video instruction. The officials are assessing the relative effectiveness of the strategies and whether student's major (economics or non-economics) has an effect. School officials randomly selected 80 economics majors and 80 non-economics majors taking the course. The officials randomly separated the economics majors into four groups of 20 and assigned a different support service to each group. They did the same for the non-economics majors. After several weeks of receiving help through their support service, the students were given a midterm exam. School officials computed the mean score on the midterm exam for each of the eight groups. These mean scores are shown in the graph below. 82 72 e Non-econ Econ 67 62 Online Video Peer tutoring dission workshops instruction Group After checking that the assumptions for the test were satisfied, the school officials performed a two-way ANOVA test. (The dependent variable was midterm exam score, and the factors were major and support service.) Their partially filled ANOVA table is shown below. Complete the table, and then answer the questions after the table. Do not round any values in the table except the F statistic values, which you should round to at least three decimal places.

Explanation / Answer

completing above ANOVA table"

at 0.05 lelve and (3, 152) degree of freedom critical value for interaction F=2.664

at 0.05 level; can the school officials conclude that there is an interaction: No

If your response above no ; answer the following: Neither

source df SS MS F statistic major 1 90 90 0.763 support service 3 510 170 1.441 Interaction 3 270 90 0.763 error 152 17929 117.954 total 159 18799

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