Question

3.         A teacher is interested in whether the number of bullying incidents by active bullies varies by class. The following data are the number of bullying incidents that occurred for 5 individuals randomly selected from 4 separate courses. Test the null hypothesis at the .01 level of significance that bullying does not vary across class. In so doing, identify: (1) the research and null hypothesis, (2) the critical value needed to reject the null, (3) the decision that you made upon analyzing the data, and (4) the conclusion you have drawn based on the decision you have made.

*Please show all work*

Class 1	Class 2	Class 3	Class 4
3	1	3	1
1	1	5	2
4	2	5	2
3	4	5	1
2	4	4	1

Answer 1

for the given data using Anova single factor in Excel we get output as

Anova: Single Factor
SUMMARY
Groups	Count	Sum	Average	Variance
Class 1	5	13	2.6	1.3
Class 2	5	12	2.4	2.3
Class 3	5	22	4.4	0.8
Class 4	5	7	1.4	0.3
ANOVA
Source of Variation	SS	df	MS	F	P-value	F crit
Between Groups	23.4	3	7.8	6.638298	0.004023	5.292214
Within Groups	18.8	16	1.175
Total	42.2	19

So from the above output