A researcher had conducted an ANOVA and found that at least one of the following methods of studying for an exam:
1) office hours regularly,
2) both office hours and review sessions,
3) just review sessions, and
4) neither office hours nor review sessions.
differed significantly from the other methods in terms of stats exam scores [F(3, 16) = 9.84, p< .05]. Below is the original ANOVA source table:
Source SS DF MS F
Between 85 3 28.33 9.84
Within 46 16 2.88
The researcher wanted to conduct pairwise comparisons to find which of the methods differed from the others in resulting stats exam scores. The researcher’s raw data were as follows:
Office (O) |
Office & Review (O&R) |
Review (R) |
None (N) |
12 |
12 |
8 |
6 |
11 |
10 |
7 |
9 |
14 |
15 |
10 |
11 |
11 |
14 |
9 |
10 |
12 |
14 |
6 |
9 |
X̄=12 SS=6 |
X̄=13 SS=16 |
X̄=8 SS=10 |
X̄=9 SS=14 |
Conduct pairwise comparisons via both Tukey’s HSD and Scheffe’s test. Show all work
SOLUTION
(1) Ho: All four groups have the same mean (μ1 = μ2 = μ3 = μ4)
Ha: At least two of the four groups have significantly different means
(2) α = 0.05, dfB = 4 - 1 = 3, dfT = 20 - 1 = 19, dfW = 19 - 3 = 16
(3 and 4)
A researcher had conducted an ANOVA and found that at least one of the following methods of study...
A researcher had conducted an ANOVA and found that at least one of the following methods of studying for an exam: 1) office hours regularly, 2) both office hours and review sessions, 3) just review sessions, and 4) neither office hours nor review sessions. differed significantly from the other methods in terms of stats exam scores [F(3, 16) = 9.84, p< .05]. Below is the original ANOVA source table: Source SS DF MS F Between 85 3 28.33 9.84 Within ...
|A researcher was interested in whether there were |differences in the effect on performance on a stats exam among students who attended 1) office hours regularly 2) both office hours and review sessions, 3) just review sessions, and 4) neither office hours nor review sessions The researcher randomly assigned students to one of the four groups. At the end of the first exam, the researcher gave students in all four groups a stats exam and obtained the following results: Office...
A researcher was interested in whether there was differences in the effect on performance on a stats exam among students who attended 1. Office hours regularly, 2. Both office hours and review sessions. 3. Just review sessions, and 4. Neither office hours nor review sessions. The researcher randomly assigned students to one of the four groups. At the end of the first exam, the researcher gave students in all four groups a stats exam and obtained the following results: Office...
Conduct an independent samples One Way ANOVA using the following data: 1. A researcher is also a fan of mixed martial arts (MMA) and helps run an MMA gym in his spare time. He decides to see which striking style is most effective and trains his fighters in one of three styles, then records the amount of significant strikes the fighters land in their next fights. The data is as shown: Muay Thai style Taekwondo style Boxing style 16 11...
A researcher was studying teachers' uses of technology in instruction. She drew four samples of high school teachers, one each from teachers of mathematics, English, science and history. She made certain that all teacher participants in the study were teaching in their field of certification and that all had between five and ten years of experience in that subject area. Each teacher completed the Teach with Tech scale (Nerdy & Frump, 2008) a self-report instrument that measures the use of...
The following data were collected from a repeated measures study which tested the effect of physiological biofeedback therapy on the reduction of state-anxiety scores across four sessions. Conduct an ANOVA to determine if there is a significant effect of this therapy. Treatments lt 10 ? = 332 Ta=24 G- 60 SSA-24 T's = 16 SS 14 Te = 12 SSc 26 TD = 8 SS 8 Attach File Browse My Computer 10 points Save Answer ESTION 27 Complete the missing...
A study of reading comprehension in children compared three methods of instruction. The three methods of instruction are called Basal, DRTA, and Strategies. Basal is the traditional method of teaching, while DRTA and Strategies are two innovative methods based on similar theoretical considerations. The READING data set includes three response variables (posttests) that the new methods were designed to improve. Analyze The Posttest 2 score using ANOVA. a. What is the response variable? Method of instruction Traditional teaching method Innovative...
Regression and Correlation Methods: Correlation, ANOVA, and Least Squares This is another way of assessing the possible association between a normally distributed variable y and a categorical variable x. These techniques are special cases of linear regression methods. The purpose of the assignment is to demonstrate methods of regression and correlation analysis in which two different variables in the same sample are related. The following are three important statistics, or methodologies, for using correlation and regression: Pearson's correlation coefficient ANOVA...
Apply the techniques of two-way ANOVA to a data sample split into eight treatments with total degrees of freedom, df = 47, testing at the 2.5% level of significance. The Sum of Squares for Treatments is 42; the Mean Square for Blocks is 9, and the Mean Square for Error is 3. SS df MS F test Stats Treatments #1 #5 #9 #12 Blocks #2 #6 #10 #13 Error #3 #7 #11 XXXXXXX Total #4 #8 XXXXXXX XXXXXXX #14: What...