Statistics Exercise III: Related-sample t; confidence intervals
These weekly exercises provide the opportunity for you to understand and apply statistical methods and analysis. Unless otherwise stated, use 5% (.05) as your alpha level (cutoff for statistical significance).
#1. For each example, state whether the one-sample, two-independent-sample, or related-samples t test is most appropriate. If it is a related-samples t test, indicate whether the test is a repeated-measures design or a matched-pairs design.
Use SPSS and the data file found in syllabus resources (DATA540.SAV) to answer the following questions. Round your answers to the nearest dollar, percentage point, or whole number.
#3. Test to see if there is a significant difference between the age of the participant and the age of the partner. Use a paired-sample t-test and an alpha level of 1%. How would you interpret the results of this test?
a. The partners are significantly older than the participants.
b. The partners are significantly younger than the participants.
c. The age of the participants and partners are not significantly different.
d. Sometimes the partners are older, sometimes the participants are older.
#4. What is the 95% confidence interval for the difference between participant and partner age?
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