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Question 3 – PART A 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. The head of public safety thinks that putting a school speed limit sign of 20 mph will decrease the speed at the intersection. 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 significance level, was there a significant change in driving speed? Use the five steps of hypothesis testing. Finally, write your answer as you would for a journal article using APA style. HYPOTHESIS TESTING Restate the question as a research hypothesis and a null hypothesis about the populations. Include a description of the two populations. - Population 1: - Population 2: - Research Hypothesis: - Null Hypothesis:

          Question 3 – PART A
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. The head of public safety thinks that putting a school
speed limit sign of 20 mph will decrease the speed at the
intersection. 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 significance level, was there a significant
change in driving speed? Use the five steps of hypothesis testing.
Finally, write your answer as you would for a journal article
using APA style.
HYPOTHESIS TESTING
Restate the question as a research hypothesis and a null
hypothesis about the populations. Include a description of
the two populations.
- Population 1:
- Population 2:
- Research Hypothesis:
- Null Hypothesis:

Question 3 – PART A
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. The head of public safety thinks that putting a school
speed limit sign of 20 mph will decrease the speed at the
intersection. 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 significance level, was there a significant
change in driving speed? Use the five steps of hypothesis testing.
Finally, write your answer as you would for a journal article
using APA style.
HYPOTHESIS TESTING
Restate the question as a research hypothesis and a null
hypothesis about the populations. Include a description of
the two populations.
- Population 1:
- Population 2:
- Research Hypothesis:
- Null Hypothesis:

Added by Monica R.

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