Question

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
0 2 0 5
2 1 5 2
1 4 5 5
5 4 4 4
4 0 6 2
4 5 4 3
2 2 3 2
5 1 0 4
1 3 4 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.  

May I Have step by step directions, I am stuck on how to get the sum of squares computed.. within...

Homework Answers

Answer #1

applying regression:

Source of Variation SS df MS F
Between Groups 7.33 3 2.44 0.79
Within Groups 98.67 32 3.08
Total 106.00 35

b)

No, post hoc analyses are not appropriate because the ANOVA is not significant.  

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