Errata for the 8th edition

for Statistical Methods for Psychology

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I am setting up this page even before the book is out, so I am fortunate not to know of many errors. However from past experience I know that there will be errors. I will add them in as I, or others, find them, along with recognition of the person who reported them.

The Text

Page Line Correction
31 Table 2.4 Andrea Eves at Edith Cowan University in Australia noted that the 5th equation should read sigma(X-Y), not sigma(XY).
67 Exercise 2.15 The reference to Exercise 2.17 should be to Exercise 2.14. This was pointed out by Charles Van Liew at SDSU.
145 First equation The denominatior should be 825. Jackie Schroeder at Cal State San Marcos found this error.
155 Second paragraph The bold entries refered to are the main daigonal in the table.
172 Exercise 6.22 The reference should be to Exercise 6.8.
184 Last word The word should be "smaller," not "larger."
191 Last line "m" should be μ.
276 Middle page John Woodard at Wayne State pointed out that I wrote s'Y.X when I meant to write s''Y.X. The numerical part of that set of equations is correct.
297 Ex9.22 The printout here is wrong. John Woodard at Wayne State pointed out that it is based on only 48 states. I have no idea why that happened. It does not alter the answer to the question, but it is certainly a foolish error.
327 Table 11.1 You need to add 0.40 to all of the data in column D6. The statistics given there are correct. I get credit for finding that error.
332 Table 11.2 THIS TABLE IS CORRECT AS GIVEN. At least I got something right.
403 Table 12.5 You need to add 0.40 to all of the data in column D6. The statistics given there are correct.
551 First paragraph Kris Preacher has moved to Vanderbilt. The new link should be http://quantpsy.org/sobel/sobel.htm.


ANSWERS TO EXERCISES
Answers Exercise 7.25 This is all screwed up. The correct answer is t = 3.186, p = .002
Answers Exercise 7.27 This is all screwed up too. The correct answer is t = 5.00
Answers Exercise 7.49 This is all screwed up because earlier ones were. The correct answer is d = 0.47, using the pretest standard deviation. Katherine Long, at Fordham University, pointed me to the last three errors. No wonder she couldn't get the answer that I gave.

 

Data Sets


There is a self-extracting archive of all of the data found in DataAll.zip. Simply click on this link and tell the resulting dialog box where you want to store the download--the desktop is fine. After the file is downloaded, click on the downloaded file and indicate where you want the data files to be stored. Once the data are extracted, you can safely delete the archive file itself. The data are tab delimited with variable names on the first row.


 



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