Errata
The errata list is a list of errors and their corrections that were found after the product was released.
The following errata were submitted by our customers and have not yet been approved or disproved by the author or editor. They solely represent the opinion of the customer.
Color Key: Serious technical mistake Minor technical mistake Language or formatting error Typo Question Note Update
Version | Location | Description | Submitted by | Date Submitted |
---|---|---|---|---|
Printed | Page 90 Third code chunk. The perm_fun function definition. |
The book tells us to specify n2 = 15 and n1 = 21, corresponding to group B and group A, respectively. The function defines indx_b as sample(1:n, n1). This does not make sense to me as it gives an index of 21 which is actually the number of observations for group A. |
Anonymous | Apr 27, 2024 |
Printed | Page 13 python example on the top |
There was no clear way to install the package required for wquantiles, I searched online and no one I could find had a solution. When using "pip install wquantiles" there is no way to just "import wquantiles." I had to find an alternative way to calculate the weighted median: |
Katie Jones | Apr 22, 2024 |
Printed | Page AB testing N/a |
I had a question about A/B testing which I hope you can help with. |
Anonymous | Mar 19, 2024 |
Page 9 2nd paragraph |
|
Albar Ugalde | Oct 16, 2023 | |
Printed, PDF | Page 99 4rd paragraph that start with "Page B has session times that are greater than those of page A by 35.67 seconds" |
i think in "The question is whether this difference is within the range of what random chance might produce, i.e., is statistically significant", last statement should removed "i.e., is statistically significant" |
Mohammed Kamal Alsyd | Jul 21, 2023 |
Page Statistical Significance and p-Values Code example |
In this section, we used the function perm_fun() which was defined in "Resampling" Section. The original function calculates the mean difference between samples, but in the example presented here, we need to calculate the difference between proportions. To solve this issue, a proposed solution is to create a new function that only changes this specific line of code: |
Anonymous | May 02, 2023 | |
Printed | Page 278 Inset on Ridge regression and the Lasso |
The indices of X should be X_{p,i} (cf. p. 151), but as it currently stands we have X_i and X_p. Shouldn't `i` refer to the example index and `p` refer to the dimension index? |
Amine Laghaout | Feb 15, 2023 |
Printed | Page 53 3rd paragraph |
left out symbol for mean of population in …”whereas is used to represent the mean of a population.” |
John Taylor | Jul 30, 2022 |
Printed | Page 53 Sample Mean Versus Population mean |
The symbol used to represent the mean of population is missing. |
Anonymous | Feb 07, 2022 |
Printed | Page 137 3rd paragrapgh |
Because the earlier draws presented in both the previous page and in the page in question (137) are suggesting that whatever value (ones) Box A takes, the Box B gets as many zeros as the remainder of the whole, which is 10,000. |
Emir Bilim | Dec 24, 2021 |