An educator wants to evaluate four different methods aimed at reducing the time children spend "off task" in the classroom. To test these methods, she implements one method in each of four similar classrooms and records the time spent off task (in minutes) in each classroom. The results are given in the table.
Classroom Method | |||
---|---|---|---|
A | B | C | D |
1 | 1 | 6 | 2 |
2 | 3 | 3 | 3 |
1 | 4 | 5 | 5 |
4 | 2 | 4 | 2 |
4 | 0 | 5 | 3 |
5 | 5 | 0 | 4 |
4 | 1 | 0 | 4 |
2 | 4 | 5 | 2 |
0 | 1 | 3 | 4 |
(a) Complete the F-table. (Round your answers to two decimal places.)
Source of Variation |
SS | df | MS | F |
---|---|---|---|---|
Between groups |
||||
Within groups (error) |
||||
Total |
(b) Is it necessary to compute a post hoc test? Explain. (Assume
alpha equal to 0.05.)
Yes, post hoc analyses are appropriate because the ANOVA is significant.No, post hoc analyses are not appropriate because the ANOVA is not significant.
a)
applying one way ANOVA from excel: data-data analysis: one way
ANOVA
Source of Variation | SS | df | MS | F |
Between Groups | 7.56 | 3 | 2.52 | 0.84 |
Within Groups | 96.00 | 32 | 3.00 | |
Total | 103.56 | 35 |
b)
No, post hoc analyses are not appropriate because the ANOVA is not significant.
An educator wants to evaluate four different methods aimed at reducing the time children spend "off...
An educator wants to evaluate four different methods aimed at reducing the time children spend "off task" in the classroom. To test these methods, she implements one method in each of four similar classrooms and records the time spent off task in minutes) in each classroom. The results are given in the table. Classroom Method A B C D 5 0 5 5 0 55 4 3 3 5 5 4 4 1 0 6 2 2 4 5 4...
An educator wants to evaluate four different methods aimed at reducing the time children spend "off task" in the classroom. To test these methods, she implements one method in each of four similar classrooms and records the time spent off task (in minutes) in each classroom. The results are given in the table. Classroom Method A B C D 5 1 4 4 4 6 4 2 1 4 3 4 1 4 5 2 2 0 4 3 4...
An educator wants to evaluate four different methods aimed at reducing the time children spend “off task” in the classroom to test these methods she implements one method in each of four similar classrooms and records the time spend off task in minutes in each classroom the results are given in the table and records the time spent off task (in minutes) in each classroom. The results are given in the table. MS groups groups (error) (b) Is it Yes,...
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To test whether students in a higher grade level will be less disruptive in class, a school psychologist records the number of documented interruptions during one day of classes from nine local high schools. The sample consisted of nine (n = 9) freshman, sophomore, junior, and senior high school classes. The data for each high school class are given in the table. High School Class Freshman Sophomore Junior Senior 2 3 1 5 4 2 3 2 1 2 ...
To test whether students in a higher grade level will be less disruptive in class, a school psychologist records the number of documented interruptions during one day of classes from nine local high schools. The sample consisted of nine (n-9) freshman, sophomore, junior, and senior high school classes. The data for each high school class are given in the table High School Class Freshman Sophomore Junior Senion 0 4 4 6 (a) Complete the F-table. (Round your answers to two...
An educational psychologist does an experiment to compare three different methods of teaching math. Subjects are randomly assigned to the different treatments, then are instructed by the relevant method for one month. After completing instruction, all three groups take the same test of achievement. A summary of the results are tabled below. Test whether there is a difference among the 3 methods, summarizing your results in an ANOVA table and in English. Method A Method B Method C Mean =...
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A university instructor uses different teaching methods on three separate computer science classes. The instructor wants to evaluate the effectiveness of the methods by comparing the grades between the classes. The grades have been transformed and are in the table below. What can the instructor conclude with a = 0.05? Method A Method B Method с 21 19 21 24 25 20 27 19 23 25 25 20 24 28 35 31 29 26 19 17 20 29 20 17...
Application Exercise: A university instructor uses different teaching methods on three separate computer science classes. The instructor wants to evaluate the effectiveness of the methods by comparing the grades between the classes. The grades have been transformed and are in the table below. What can the instructor conclude with an a of 0.01? Method A Method B Method с 21 19 21 25 25 20 24 19 17 20 23 20 17 20 34 22 29 26 a) What is...