Three different sections of the same Interstate highway, with roughly equal traffic volumes, have been patrolled by the State Police at different levels of intensity for the past six months
The posted speed limit is 55 and the speeds of a random sample of motorists have been registered for each of the three sections. Is there any statistically significant difference in the speeds? Use the five step model as a guide and write a sentence or two of interpretation for your results.
Lightly Patrolled Moderately Patrolled Heavily Patrolled
55 57 50
48 58 51
58 58 60
65 55 58
72 55 55
67 59 52
54 58 55
65 54 55
ANSWER: SST = 715.33
SSB = 158.32
SSW = 557.00
F = 2.99
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