The null hypothesis in a paired samplesttest is that the two

1. samples have identical means
2. populations have different means
3. populations have identical means
4. samples have different means

A school superintendant was planning for the upcoming school year.She was assessing the needs for classroom supplies and wanted to know if there was a difference among class sizes at elementary, middle, and high schools in the district.Here are the data:

Elementary Middle Secondary

27 17 10

25 12 12

30 10 14

17 8 16

14 5 18

20 20

10

What test should she conduct to determine if there is a difference among the levels?What do the results mean?Please write up your results according to the handbook and describe any follow up or additional statistical analysis, if necessary.