Independent Samples t Test

Go to www.ablongman.com/george9e and click on the "Data Sets" link at the top of the page. Download the EX14-7.sav file. You will need to open the file in SPSS to complete this assignment.

(Note: Only focus on the variables for stress and caffeine for this assignment. Caffeine is the number of caffeinated beverages consumed during the study.)

1. In the body of your post include the following:

1. List the variables and explain their scale of measurement (nominal, ordinal, interval, or ratio).
2. You are told that this study was looking at the effects of stress (low or high) on consumption of caffeine. It was believed that those who were exposed to a high stress situation would differ from those who were exposed to a low stress situation in the number of caffeinated beverages they would consume. List and explain the independent and dependent variables.
3. What are the mean, median, mode, range, standard deviation, and variance for caffeine?
4. What are the null and alternative hypotheses for the study? Provide the statistical notation and written explanation for each.
5. What would be the specific Type I and II errors that could occur for this study?
6. Should we perform a one-tailed or two-tailed significance test? Explain.
7. What are the results of an independent samples t-test on this sample? Was there a statistically significant difference between the two groups? How do you know? If there was a difference, how do the means compare (which was higher/lower)?
8. What is the 95% confidence interval for this test? Explain.
9. What conclusion might you draw from these results? Do we retain or reject our null hypothesis? Explain.

B. Attach the output file to your post:

1. Obtain the frequencies, central tendency, and variability measures for caffeine.
2. Run the independent samples t test.
3. Clean up the output file created and then save it as a spv file to your computer. [Note:

2. Chi-Square Test

Go to www.ablongman.com/george9e and click on the "Data Sets" link at the top of the page. Download the divorce-studentversion.sav file. You will need to open the file in SPSS to complete this assignment.

(Note: Only focus on the variables for sex and status for this assignment. Status refers to the marital status of the individual, as noted by the values designated in the Variable View in SPSS.)

1. In the body of your post include the following:

1. List the variables and explain their scale of measurement (nominal, ordinal, interval, or ratio).
2. What are the null and alternative hypotheses for the study? Provide the statistical notation and written explanation for each.
3. Why would we conduct a Chi-Square test on this data set?
4. What were the results of the Chi-Square test? What is the observed frequency for each cell? Describe what you know about this association and the significance demonstrated by the test, as well as what this means in relation to the hypotheses.

B. Attach the output file to your post:

1. Obtain the frequencies for sex and status via the Crosstabulation option.
2. Run the Chi-Square test.
3. Clean up the output file created and then save it as a spv file to your computer.

Price: $15.35

Solution: The downloadable solution consists of 7 pages, 835 words and 3 charts.
Deliverable: Word Document