Thousands of motorists travel on Highway 27 everyday. Before installation of traffic cameras at mile marker 11, motorists' speeds averaged 72 mph. After installation of cameras, speeds averaged 67 mph. A paired samples t-test comparing the average speeds yielded a t-statistic of 1.02. Remember, the critical value at p=.05 is 1.96. Assuming our data meet the requirements for conducting a t-test, what can we conclude?There is less than a 5% chance that we would have observed this average difference if there really wasn't a difference in average speeds before and after the camera was installed.We cannot draw any conclusions because we should have used an independent samples t-test.We cannot draw any conclusions because we should have used a one-sample t-test.We cannot draw any conclusions becaue the p-value is not reported.We cannot draw any conclusions because the standard deviation was not reported.We do not have enough information to draw any conclusions.

Name: Thousands of motorists travel on Highway 27 everyday. Before installa
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: Thousands of motorists travel on Highway 27 everyday. Before installation of traffic cameras at mile marker 11, motorists' speeds averaged 72 mph. After installation of cameras, speeds averaged 67 mph. A paired samples t-test comparing the average

Answered: Image /qna-images/answer/7005a92b-0895-4a9e-8129-df74c569fb04.jpg

Answered: Thousands of motorists travel on…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Topic Video

Question

Thousands of motorists travel on Highway 27 everyday. Before installation of traffic cameras at mile marker 11, motorists' speeds averaged 72 mph. After installation of cameras, speeds averaged 67 mph. A paired samples t-test comparing the average speeds yielded a t-statistic of 1.02. Remember, the critical value at p=.05 is 1.96. Assuming our data meet the requirements for conducting a t-test, what can we conclude?

There is less than a 5% chance that we would have observed this average difference if there really wasn't a difference in average speeds before and after the camera was installed.
We cannot draw any conclusions because we should have used an independent samples t-test.
We cannot draw any conclusions because we should have used a one-sample t-test.
We cannot draw any conclusions becaue the p-value is not reported.
We cannot draw any conclusions because the standard deviation was not reported.
We do not have enough information to draw any conclusions.

Expert Solution

Step 1

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

$Hypothesis Tests and Confidence Intervals for Means$

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.

Similar questions