Question: ) Class sizes were noted for a random sample of classes at 3 levels for a large school district. At =0.01, can it be concluded

  1. ) Class sizes were noted for a random sample of classes at 3 levels for a large school district. At =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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