Permutation Test Example: Web Stickiness

[singing-scientist]

I am working through the example of session times in Chapter 3 > Permutation Test > Example: Web Stickiness. I have assumed that the data to which this example refers is that located in the file web_page_data.csv.

For pages A and B, respectively, it seems that the time is listed in the table as minutes, because the correct result for mean_b - mean_a (21.4) is obtained after converting to seconds. However, if this is correct, then Figure 3-3 is not. Figure 3-3 appears to show Time as minutes100, rather than as minutes60 (i.e., seconds). Which is correct?

Thanks!