SAT, 22.04.2021 17:40 alyssaxsanchez
The head of public safety notices that the average driving speed at a particular intersection averages 35 mph with a standard deviation of 7.5 mph. After a school speed limit sign of 20 mph is placed at the intersection, the first 40 cars travel past at an average speed of 32 mph. Using the .01 alpha level, was there a significant change in driving speed? use the four steps hypothesis
Answers: 1
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The head of public safety notices that the average driving speed at a particular intersection averag...
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