Class sizes were noted for a random sample of classes at 3 levels for a large school district. At α =0.01, can it be concluded that there is a difference in the mean class size at the three different levels? If a difference exists, test each pair of means to locate the difference.

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Class sizes were noted for a random sample of classes at 3 levels for a large school district. At α =0.01, can it be concluded that there is a difference in the mean class size at the three different levels? If a difference exists, test each pair of means to locate the difference.

 

Elementary

Middle School

Secondary School

30

24

20

28

27

18

25

30

24

26

25

20

28

26

23

32

28

24

24

 

24

29

 

 

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