Homework Ch 11
Homework Chapter 11 (Due Tuesday)
11.1
a. Make boxplots for the data. Discuss the boxplots
b. Conduct a one-way analysis of variance on the data. Discuss the findings.
c. Calculate eta and power. Discuss the findings.
11.2
Conduct a one-way and a t-test using the data in 11.2. Discuss your findings with each test. How are the two tests similar and or different?
11.3 answer questions a, b, and c.
11.27
a. Make boxplots and a linegraph (see the options button when you run the procedure) for the data. Discuss the graphs – include in your discussion which graph is more informative.
b. Conduct a one-way analysis of variance on the data. Discuss the findings.
c. Calculate eta and power. Discuss the findings.
Let me know if you have any questions,
--Dr. M
posted by maclin_uni @ 2:38 PM
6 Comments:
I'm having some troubles on ch.11 (27) when it comes to the linegraph. I don't know what goes in what box...so many options!
Hi,
You can use the means plot option.
Check out - http://www.uni.edu/~maclino/as/ex11_27.bmp
I'm finding that chapter 11 is very difficult reading. It's really hard to follow all of the computations. How much of that stuff are we going to have to know for the test? Also, the value of sigma that I got for the example we did in class was different, so I'm not sure if I'm calculating it right. As far as I understand, we take the standard deviations from each group, square them, add them up, devide the result by two, and then take the square root of that number. Is that right?
Comment: Reading chapter 11...
Response: yes I know - I just finished outlining chapters up to chapter 16 and they are getting more difficult due to the math and theory behind the math. Good thing we have SPSS to do our heavy lifting.
They way I go about outlining the chapters is to enter the data Howell uses for the basis of his computations into SPSS and follow the math (and logic behind the math) using SPSS.
I would recommend the same for you. If you need a brush up on any SPSS procedure - just visit Andy (Field) and see how he does it (or ask me).
Comment: How much are we going to need to know for the next test?
Response: A better question is what am I going to have to know about statistics if I am going to stay in psychology? I think you should have a good general understanding of what is in the chapters. Enough to where you can go back to that section and reference whatever you might need in the future. My part of the deal is to highlight what I think you will most likely need in graduate school and beyond. I try to cover these things in class and in my lectures that I am posting as pdfs. I have been making sure the homework reflects the lecture and then assign enough repetition so that the material becomes ingrained. I know that at the end of the day (end of the semester) you will be proud of how much you know about statistics, SPSS, Excel, and g power.
You may want to check with the TA about sigma...
I hope this helps,
--Dr. M
Did we discuss calculation of power for ANOVA? I don't have it in my notes and I can't seem to figure it out.
Comment: Did we discuss calculation of power for ANOVA? I don't have it in my notes and I can't seem to figure it out.
Response: yes we did - it is on the last few slides of the handout using g power.
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