Reference no: EM133731830

Question 1
Over the past decade, ABC Manufacturing has increased the number of safety inspections per month in hopes to decrease the number accidents on their production line. Below is a list of how many inspections were conducted in a month and the corresponding number of accidents recorded. Is there a correlation, and has this leadership decision been effective?

Question 2
Is there a difference in profit in the first quarter compared to the second quarter for investor's portfolios? Each participant's investment portfolio was evaluated in the first and second quarters to see if there was a difference. Which test should be conducted? Calculate the results, write up the results, and interpret what the results mean. The data set is below:

Question 3
The ACT standardized college admission exam was given in three rooms at a local testing site. A complaint was filed that one of the testing conditions of each room were not the same and caused a difference of scores. You have been asked to provide a statistical analysis to support or refute the claim. Determine your hypotheses, run the appropriate test, and provide the appropriate conclusion.

The scores from each of the three rooms were:

Question 4
A marketing team conducted a survey of 300 people to see if a person's age affected their brand choice. People under the age of twenty-five made the following choices: Brand A (25), Brand B (42), Brand C (33). People over 65 made the following selections: Brand A (20), Brand B (38), Brand C (42). The group between those ages made these choices: Brand A (44), Brand B(40), Brand C (16). Form your hypotheses, run the appropriate test, and provide a conclusion to the marketing team.

Question 5
Here are some data based on a study by St. Leger, et al. (1978 and described in Howell, 1995). The data come from 10 countries. One variable is the number of physicians per 10,000 population. The other variable is an infant mortality rate that is adjusted so that the wealth of the country is not being measured. Analyze the data with a nonparametric test and comment on the results and write a conclusion.

Physicians Rank     Mortality Rank

1                             2     

2                             1     

3                             4     

4                              3     

5                             6     

6                             5     

7                             9     

8                             8     

9                           10     

10                            7

Question 6

You have completed the DSRT 734 course. It is time to apply your learning. Respond to each of the following areas:
Design a research question relevant to your specialty area.
Describe what type of data you would gather to answer the research question.
Determine which statistical test would be best to answer your research question.
What would you determine if the results were significant, based on your research question?
Ensure you include at least one reference.