The data below yielded a significant F value:
|
Group 1 |
Group 2 |
Group 3 |
Means |
2.83 |
6.57 |
15.71 |
n = |
6 |
7 |
7 |
MS (within) = 19.76
Use the Studentized range statistic test (Q-test) for differences between the means. State each hypothesis you are testing, show your computations and state your decisions based on each hypothesis. (Assume alpha = .05) Also, state your conclusions in words or symbols.
Assignment #3 Assignment #3 – Due: February 21, 2021 at 11:59:59 PM Psychology 2020 6.0 – Statistical Methods I and II – Dr. James Check Chapters 11-15 in Hurlburt STYLE GUIDELINES: i. Submit your assignment in a single file named with the last name of a group member as LastName-Assignment2. ii. Make sure your names are on the assignment. A title page is advisable, but at the very least, group member names should be at the top of the first page. iii. Whether typed or scanned, make sure that your font/writing is large enough and clear enough to read. iv. Proofreading is suggested. Make sure none of your tables/figures are cut off, all your questions are answered completely, etc. Make sure you submit the final version of your assignment. v. Email your submission to
[email protected] by the due date and cc all of your group members. This way everyone knows the assignment has been submitted and there will be no confusion. 1. What does a significant F-test tell us about the means of the J groups? In the case where we find a significant F value, what is the next step to understanding the pattern of means in the data? In the case where we find a non-significant F value, how can we explain the observed differences between the means? (Marks = 20) 2. If we had more than J=2 groups and we used a t-test to compare the largest and smallest means and we use alpha = .05 for the t-test, will the probability of a Type-I error be larger or smaller than .05? (Marks = 10) 3. What is the advantage of using multiple comparison techniques like Tukey over multiple (uncontrolled) t-tests? (Marks = 10) 4. If you have J = 8, what is the maximum number of possible pairwise comparisons you can make? (Marks = 10) 5. The data below yielded a significant F value: Group 1 Group 2 Group 3 Means 2.83 6.57 15.71 n = 6 7 7 MS (within) = 19.76 Use the Studentized range statistic test (Q-test) for differences between the means. State each hypothesis you are testing, show your computations and state your decisions based on each hypothesis. (Assume alpha = .05) Also, state your conclusions in words or symbols. (Marks = 50) mailto:
[email protected]