Errata for Stats: Modeling the World, first edition

 

Text:

Page

Correction

84

last paragraph: 1.60 - 0.44 = 1.16

90

footnote: Appendix G

97

Normal Prob Plots, first paragraph: -2.58

139

horizontal axis is zTotalFat, vertical is zProtein

140

horizontal axis is zTotalFat, vertical is zProtein

143

b1 equation should have 16.4 g fat

146

3rd line: 16.4 grams

152

last paragraph in Computer box: to the nearest gram.

155

#8: 1st graph, vertical axis label: Avg Attendance

161

#35: in the output the slope should be negative (-3.23)

176

#3: first row of table is 1900 - 1950

176

#6: designate the questions a) and b)

177

#9: model should use C-hat

191

The LinReg screen capture is wrong

224

#14: refers to Exercise 13

297

Tell: 28%, not 22%

317

The model is N(18, 2.12)

400

#15: Twins. Some doctors suspect that young mothers have fewer multiple births. In 2001 a large etc. (Leads toward a one tail test.)

403

in the z calculation, the denominator is 0.041

407

table entries for alpha = 0.01 should be 2.33 and 2.576

408

HA: p < 0.80 (one tail, lower tail)

410

first full paragraph: (Ho: the student has learned only 60% etc.)

416

in output: Test of p = 0.5

422

SD formula, first fraction's numerator should be p1q1

429

just above the curve, pold needs a hat

447

(2nd line) should refer to Table T

460

in output: Alpha 0.05

552

(4th paragraph) page reference should say (See p. 548)

560

computer output, 2nd column: coefficient;

in the equation below: -42.73 + 1.7waist

 

Answers:

Exercise

Correction

5.17c

113 seconds

8.21a

delete stray point near the origin

8.25c

+ 11.06 x fat

9.9c

around 32 degrees

III-42

The theoretical probability is around 3%

16.5a

values for Kids should be 1, 2, 3 instead of 0, 0, 3

17.12d

IV-9c

last term should have

19.6c

The interpretation is correct.

25.17b

between 51.4 and 74.6

27.21c

P-value = (0.0029) = 0.00145 (because it's a one-tailed test)

 

TRG

Page

Correction

17-5

Unit Test 1. C

26-5

2) enlisted 90 subjects

27-8

In the data table, the 2nd set of column headings should be Average temp and Elec (kWh)

 

Testing Manual

Page

Correction

Quiz 26

all expected values are greater than 5