In order to find the best meth
- In order to find the best method to teach statistics, Dr.Nelson used strictly power point slides, white board with blackmarkers, and a white board with color markers for his threedifferent classes. His main objective was to compare exam scores inthe three different classes. The results were as follows:
Class |
Exam Score |
Class |
Exam Score |
Class |
Exam Score |
1 |
87 |
2 |
87 |
3 |
89 |
1 |
86 |
2 |
85 |
3 |
91 |
1 |
76 |
2 |
99 |
3 |
96 |
1 |
56 |
2 |
85 |
3 |
87 |
1 |
78 |
2 |
79 |
3 |
89 |
1 |
98 |
2 |
81 |
3 |
90 |
1 |
77 |
2 |
82 |
3 |
89 |
1 |
66 |
2 |
78 |
3 |
96 |
1 |
75 |
2 |
85 |
3 |
96 |
1 |
67 |
2 |
91 |
3 |
93 |
- State the null and research hypothesis.
- Calculate the F value by hand using a source of thevariance table.
- What is the interpretation of the critical value compared tothe observed value at .05 level of significance?
- What is the conclusion for α = .05? Write up the results atp = .05 in APA format using the SSPS output below:
(I). Group |
(J) Group |
Mean Difference |
Significance |
Different? |
PowerP’s |
Black Markers |
-8.60 |
.071 |
|
PowerP’s |
Color Markers |
-15.00 |
.001 |
|
Black Markers |
Color Markers |
-6.4 |
.257 |
- What is the value of ω2 & ε2and what do both the effect sizes tell us?
Answer:
To test the null hypothesis
ie The three teaching methods yields the same score or there is nodifference in the teaching methods
against the alternative that atleast one method differ from theothers
An ANOVA test has been conducted to test the above hypothesisand the table is given below
F value is calculated using the formula =MS between/MSwithin=566.533/64.385=8.799
The pvalue tells us to reject the null hypothesis at 5%significance level . since p value <0.05
Also the F value > F critical value which again directs us toreject the null hypothesis
(I). Group |
(J) Group |
Mean Difference |
Significance |
|
|
PowerP’s |
Black Markers |
-8.60 |
.071 |
NOT Different | |
PowerP’s |
Color Markers |
-15.0 |
.001 |
Different | |
Black Markers |
Color Markers |
-6.4 |
.257 |
NOT Different |
power point and color markers are statistically significant at5% significance level.
"Our Prices Start at $11.99. As Our First Client, Use Coupon Code GET15 to claim 15% Discount This Month!!"
