Errata for Explaining Psychological Statistics, Second Edition

To determine which printing of the second edition you have, look at the page opposite the dedication page ("For Leona"), which is also the reverse side of the second title page.  At the bottom of that page, you will see a sequence of numbers like this: 10 9 8 7 6 5 4; the last number in the sequence is the number of the printing you have (the sequence in this example is for the fourth printing).

If you have printing 5 or 6, please make the changes in the table immediately below. (To avoid having to create subscripts, I have used a notation in which X sub 3 means that X has 3 as a subscript, and X sup 3 means that X has 3 as a superscript). If you have an earlier printing, you should also make these changes and then look for additional errata tables below.  

Please send any additional corrections, comments, suggestions, etc., to me at: barry.cohen@nyu.edu.

 

Page Number

Line/ Location

Correction (for all printings of the second edition, up to the 6th printing)

p. 46

Table 2.15

For the single column of numbers under the heading “Stem,” numbers not followed by an asterisk, should be followed by a period.

p. 67

Answers to Chap. 3, sec. A

For #8, the third line should read: "Compared to the values calculated in Exercise 6b..."

p. 86

Answers to Chap. 3, sec. C

For #10b, it should read: "Compare your answer to your answer for part a of Exercise 9."

p. 116

In first sentence under “The Central Limit Theorem”

Insert the term “real-life” so it reads like this: "… and we know that real-life populations do not perfectly follow a normal distribution …”

p. 119

Paragraph preceding “Rule 3:…”

First sentence should read: “Just as two events can be mutually exclusive but not exhaustive (e.g., z > +1.0 and z < -1.0)… “; the second sentence should read: “For example, the two events z > -1.0 and z < +1.0 are exhaustive …”

p. 157

Line 16

Should read: “… (Guinness was afraid that other beer companies …”

p. 211

4th line of summary pt. #5

Change: “(n sub 1 – n sub 2 – 2)” to “(n sub 1 + n sub 2 – 2)”

p. 226

Equation in middle of page

The letter “d” in the second term of the equation should be in boldface, and not italics.

p. 342

The line just above

“Assumptions of the One-Way ANOVA”

There should be a slash between the terms T sub T sup 2 and N sub T to indicate that they should be divided, rather than multiplied.

p. 353

2nd line below Formula 12.14

Change “(Formula 12.13)” to “(Formula 12.12)”

p. 393

2/3 down page

Three lines above “New Terminology” the word because is misspelled.

p. 400

Fifth line from bottom of page

Should read: “…because the drug does work much better …”

p. 413

Line 5 below “Step 6…”

Should read: “…F, which is 6.64, is greater than the corresponding critical F, 3.23.”

p. 422

2/3 down page

First sentence of last paragraph should read: “In Figure 14.9 … in the two-way ANOVA (F = 18.3); it is the …”

p. 432

Exercise #3

Should end like this: “… test all of the possible 2 2 interaction contrasts, as post hoc comparisons.” [See also change to p. 719.]

p. 437

Line 9

“…Table 15.1 that highlights the use of the (eight) different subjects as levels of a …”

p. 437

Second sentence of last full paragraph

Should read: “You may remember that higher positive correlations meant higher …”

p. 443

14th line from bottom of page

Should read: “… would be analyzed using an RM ANOVA …”

p. 473

2/3 down page (just before sentence that begins “Finally,)

Should read: “ = 18(21.19) = 381.4”

p. 566

Formula 18.1

Should read: “Y = + α sub i + e sub ij ” [Changing subscript of alpha from “j” to “i”.]

p. 605

Five lines from bottom of page

Should read: “… in Table 18.15 is not correlated …”

p. 609

Formula 18.1

Should read: “Y = + α sub i + e sub ij ” [Changing subscript of alpha from “j” to “i”.]

p. 711

Answers to Chap. 2, sec. C

For #2 and #4, for the single column of numbers under the heading “Stem,” numbers not followed by an asterisk, should be followed by a period.

p. 719

Upper-right corner (answer to 14C3)

Answer should begin: “3. F sub S = 2 3.17 = 6.34. Then change “F sub crit = 4.125” to “F sub S = 6.34,” for each of the three tests.

p. 720

Lower-right corner (answer to 16B3)

Bottom two lines should begin: “F sub emotion = 12.25/.458” and “F sub inter = 64.0/.458”

 

If you have printing number 3 or 4, please make the following five corrections in your text (again, note that X sub 3 means that X has 3 as a subscript).

Page Number

Line/ Location

Correction

 

p. 207

7 lines from the bot. of the page

Change "more than twice as large" to "more than four times as large".

p. 302

First equation (1/3 down page)

The means in the numerator of the equation, 208 & 206.4, are incorrect. They should be 158 & 156.4 (as in Table 11.1). The result of the eq'n remains the same.

p. 368

5 lines above Formula 13.5

Should read: "...it relies on sample variances in its denominator, instead of population variances, which are usually unknown.)" [The “which” clause should be moved to the end of the sentence.]

p. 423

Line 10

There should be four means enclosed within the parentheses: 25.0, 25.6, 22.6, 21.4.

p. 473

2/3 down page

"S sub =" should be "SS sub ="

 

 

If you have printing number 2, please add the following two corrections in your text:

p. 469

Line 6 below table

Should be: "32 * .386" (add a multiplication sign between 32 and .386)

p. 589

Line 15

should read: "... greater power for pairwise comparisons ..." (the word "pairwise" should not be capitalized).

 

 

If you have a copy of the first printing, you need to make all the corrections indicated in the table below. 

p. xxxi

Preface for the Instructor

The url on the middle of page xxxi is not very helpful. Go to http://www.wiley.com/college/psyc/cohen345822/instructor.html to find the instructor's manual and test items (you will be prompted to set up a password).

p. xxxiv

Preface for the Student

The url 3/4 down the page is not helpful. The only item on the student web site (not password protected) is the set of computer exercises (including data sets). Please go to: http: //www.wiley.com/college/psyc/cohen345822/student.html for this material.

p. 73

Line 14

Should read: "Sum X- N m", instead of "Sum X- Sum m".

p. 76

Exercise 9

should read: "value for s", instead of: "value for s "

"

Exercise 10

should read: "value for s ", instead of: "value for s"

"

Line 9

should read: "s sub new = C s sub old"(add the constant C)

p. 88

Formula 3.19

Add "- 3" to the end of the formula so that it matches the correct version of the Formula 3.19 on page 84

p. 122

Exercise 5, c.

should read: "... below 70 bpm ... above 76 bpm?"

"

Exercise 6, d.

should read: "... IQ below 90 and ... and IQ above 115?"

p. 175

Next to last line

should read: " to create an unbiased estimator of s sup 2 (the lower-case Greek sigma replaces the letter "s")

p. 218

Figure 8.3

The Greek letter "gamma" appears as a label in each part of this figure, but it should be replaced in each case by a bold, lower-case letter "d" to indicate a population effect size.

p. 222

Three lines below Formula 8.4

Should read: "…the letter g to represent a point estimate of d …" (The letter d in boldface replaces the Greek letter delta.)

p. 253

Exercise 10

This was written in terms of and s with subscripts of 1 and 2, but it should have been and , with s having subscripts of x and y.

p. 265

Line 5 of next to last paragraph

Should read: "whereas d is like a z score" (the Greek letter delta should be changed to d).

p. 289

Line 2

Should read: "If b sub XY is less than 1, b sub YX will be greater than 1" (the X and Y should be reversed in the subscript of the second "b")

p. 302

First equation (1/3 down page)

The means in the numerator of the equation, 208 & 206.4, are incorrect. They should be 158 & 156.4 (as in Table 11.1). The result of the equation remains the same.

p. 379

About 2/3 down the page

Should read: "The way that the groups are ordered in Table 12.2," {not Table 12.1, as it reads now)

p. 410

Line 21

should read: "calculate the BIASED variance" (add the word in all caps)

p. 423

Line 10

There should be four means enclosed within the parentheses: 25.0, 25.6, 22.6, 21.4.

p. 432

Exercise 5 & 6

Change "factor" to "effect".

p. 445

Exercise 4

Label in Table should be , not X

p. 469

Line 6 below table

Should be: "32 * .386" (add decimal point)

p. 473

2/3 down page

"S sub =" should be "SS sub ="

p. 477

Lines 3 and 4

On both lines, SS sub S X RM, should be SS sub G X RM

p. 479

Table 16.4

The entries for SS, MS, and F in this table are a bit off (they are based on the first edition of the text, but the data have changed slightly in the second edition). The corrected table appears at the end of this errata page.

p. 479

Line 4 below table

Should read: " individual subjects with word type (SS sub S X RM)." (change G to S in the subscript of SS)

p. 486

Middle of page

Should read: " SS sub RM = N sub T " (not S sub RM, as it reads now)

p. 495

Exercise 2, a.

Should be: "SS's" (the third "s" should not be a subscript)

p. 542

Middle of page

The formula on this page should have been labeled Formula 17.15

p. 546

Exercise 2, c.

Should be: "(square the result of Formula 17.10)"

p. 554

Line 22

Change first word on this line from "predictor" to "criterion"

p. 560

Exercise 6

See Instructor's Manual for changes to the data for this exercise

p. 566

Line 18

should read: "which is equal to zero minus ..." (change m to zero)

p. 578

Equation before last paragraph

The denominator that reads "81" should be ".91", and the next denominator, which reads ".81", should also be ".91". The final answer should be 3.36, not 3.78, but this does not change the conclusion with respect to significance.

p. 589

Line 15

should read: "... greater power for PAIRWISE comparisons ..." (add the word in all caps)

p.675

Line 4

delete line 4 and replace it with: "four of the minus scores are fairly small."

p. 686

Exercise 4, b.

should read: "alpha = .01?" (not .03)

p. 709

Exercise 1B1g

The sum is 285, not 240

p. 712

Exercise 4C6d

The answer should read: "2 * (.2514)(.1587) = .08

p. 716

Exercise 10C1a

The wrong formula was used to find the point-biserial r in the answer key. The following would be an acceptable answer:

p. 716

Exercise 10C1b

Does not appear in answer key. The answer is:

 

 Table 16.4 (p. 479) should read as follows:

Source

SS

Df

MS

F

P

Between-Subs

381.4

5

 

 

 

Groups

5.54

1

5.54

.06

> .05

Within-Groups

375.86

4

94.0

 

 

Within-Subjects

84.6

12

 

 

 

Treatment

16.25

2

8.13

5.61

< .05

Group X Treat

56.76

2

28.38

19.57

< .01

Residual

11.59

8

1.45

 

 

Total

466

17

 

 

 

 


 

Main: Statistics page

Introductory Statistics for the Behavioral Sciences

Essentials of Statistics for the Social and Behavioral Sciences

Explaining Psychological Statistics