I am reading an example, one that is concerned with the topic mentioned in the title of this thread.
The example problem is:
"The use of alcohol by college students is of great concern not only to those in the academic community but also, because of potential health and safety consequences, to society at large. The article “Health and Behavioral Consequences of Binge Drinking in College” (J. of the Amer. Med. Assoc.,1994: 1672–1677) reported on a comprehensive study of heavy drinking on campuses across the United States. A binge episode was defined as five or more drinks in a row for males and four or more for females. Figure 1.4 shows a stem-and-leaf display of 140 values of $x=~the~percentage~of~binge~drinkers$ of undergraduate students who are binge drinkers. (These values were not given in the cited article, but our display agrees with a picture of the data that did appear.)"
So, from my understanding, the first row corresponds to the percentage value $04\%$; the second row corresponds to $11.34567889\%$, and so on.
What confuses me is a few statements they make later on:
Suppose the observations had been listed in alphabetical order by school name, as
$16\%$ $33\%$ $64\%$ $37\%$ $31\%$...
Then placing these values on the display in this order would result in the stem 1 row having 6 as its first leaf, and the beginning of the stem 3 row would be
3 | 371..."
Where are they getting these extra digits? And how does 3 | 371 correspond to the third entry of this list? If I was to write the stem-leaf display of these few pieces of data, I would write:
1 | 6
3 | 3
6 | 4
3 | 7
3 | 1
Is the book wrong?