Errata in
As with any book, I expect there will be some errors. On this page, I will post any errors that I find or that teachers report to me. If you find an answer/problem/example confusing, look here first.
I do report these errors to the publishing company. So, if you see something listed as an error here that is no longer an error in what you're seeing, that's means they have corrected it and that's great!
E-book | Applets | Minitab Manual | Self Quizzes | Study Guide| EESEE Case Studies
15.8 (Oct. 22, 2009) The text says to test the claim that mu < 5, but the Ha shown in symbols is mu > 5. You should use what the text says. That leads to the correct answers, in which the p-value gets closer to zero as the sample size gets larger.
Chapter 22, page 571, section Using Technology. (November 23, 2009) In Figure 22.2, in the Minitab output, the second column says Age 29, when it should say Age 20.
Chapter 22, page 572, section Using Technology. (November 23, 2009) Example 22.5. In the first line, "chi-squared = 193.55, P < 0.001." This is correct, but students here at ACC find this misleading.
The only two methods we use at ACC are the chi-squared table, which would say P < 0.0005 and Minitab, which reports P = 0.000. On the previous page, students also saw the the TI calcuator reports the P-value as 6.98x10^(-35). None of these say P < 0.001, so it our students don't know where this is coming from. Since they are mostly using the chi-squared table it looks as if someone is reading the table incorrectly, and that is confusing.
It is written in this way, I'm quite sure, because it is in the "Using technology" section and one of the common statistical packages reported it in this way. I don't have access to say all those packages to find out which one it is. A better sentence here would be "The ____ software reports chi-squared = 193.55 and P < 0.001."
E-book -
11.9 (Oct. 23, 2009) The standard devation of the population, called sigma, is supposed to be 41. In the e-book, we see the same value for the standard devation as for the mean, which is 188. That's not correct.
15.8 (Oct. 22, 2009) The information in the paragraph says to test the claim that mu < 5, but the Ha shown in symbols is mu > 5. You should use the information in the paragraph. That leads to the correct answers, in which the p-value gets closer to zero as the sample size gets larger.
1. (From the previous edition, but probably relevant in this edition as well): A student had trouble running the applet in StatsTutor and asked for help. Another student offered some very useful help that I hadn't seen anywhere before.
No errors identified at this time.
No errors identified at this time.
No errors identified at this time.
Last updated November 24, 2009 . Mary Parker