As a researcher for the EPA, you have been asked to determine if the air quality in the United States has changed over the past 2 years. You select a random sample of 10 metropolitan areas and find the number of days each year that the areas failed to meet acceptable air quality Based on the data, answer the following questions. 1. What is the purpose of the study? 2. Are the samples independent or dependent? 3. What hypotheses would you use?
As a researcher for the EPA, you have been asked to determine if the air quality in the United
States has changed over the past 2 years. You select a random sample of 10 metropolitan areas
and find the number of days each year that the areas failed to meet acceptable air quality
Based on the data, answer the following questions.
1. What is the purpose of the study?
2. Are the samples independent or dependent?
3. What hypotheses would you use?
4. What is (are) the critical value(s) that you would use?
5. What statistical test would you use?
6. How many degrees of freedom are there?
7. What is your conclusion?
8. Could an independent means test have been used?
9. Do you think this was a good way to answer the original question?
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 2 images
