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TEACHING TIP:
STATS applied! STATS applied!

The STATS applied! feature is designed to
draw in students and preview the kinds Lesson 2.1
Do You Sudoku? of interesting questions that statistics
The sudoku craze has officially swept the globe. Here’s what Will Shortz, crossword puzzle can answer. Data are everywhere—even
editor for the New York Times, said about sudoku: in Sudoku puzzles. This STATS applied!
As humans we seem to have an innate desire to fill up empty spaces. This might explain will look at one of the most common
part of the appeal of sudoku, the new international craze, with its empty squares to be filled
with digits. Since April 2005, when sudoku was introduced to the United States in The New (and perhaps most interesting) tasks in
York Post, more than half the leading American newspapers have begun printing one or more statistical analysis: comparison. Although
(C) 2021 BFW Publishers -- for review purposes only.
sudoku a day. No puzzle has had such a fast introduction in newspapers since the crossword Mr. Starnes and his wife Judy played
craze of 1924–1925. 1 at two different skill levels, by the end
Since then, millions of people have made sudoku part of their daily routines.
of this lesson, students will be able to
Mr. Starnes played an online game of sudoku at www.websudoku.com . He finished compare their performances fairly.
an easy puzzle in 3 minutes and 20 seconds. How does the author’s performance
rate among all the easy puzzles solved at this website? His wife Judy, who is an avid
sudoku player, completed a medium puzzle in 5 minutes. Whose performance is
better, relatively speaking?
We’ll revisit STATS applied! at the end of the chapter, so you can use what you have learned to help
answer these questions.

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CHAPTER 2 • Modeling One-Variable Quantitative Data 89

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