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WinPicks Reference Manual
Section 9.8. Statistically Significant Trends

When you use TEAM HISTORY or SITUATION ANALYSIS, you may notice that some trends are marked with an asterisk (*). When you see an asterisk, it means that the team in question has done much better (or much worse) than average in this situation, and therefore this trend is considered to be statistically significant.

By default, WinPicks identifies trends that are more than two standard deviations from the mean as statistically significant. However, you can vary the number of standard deviations from 1 to 4 by selecting SET TREND SIGNIFICANCE from the the TREND menu (Figure 9.80).

Figure 9.80 - Significant Trend Settings

If you want to learn more about standard deviation, nearly any book on statistics will explain how to calculate it. However, one simple way to illustrate standard deviation is to empty a box of toothpicks onto a flat surface. When the toothpicks come to rest, most will remain clustered near the spot where they landed. This spot represents the average or mean. You’ll probably see toothpicks spread out around the mean in a fairly consistent fashion. Statisticians call this normal distribution. As you get further and further from the mean, you’ll see fewer and fewer toothpicks. If you recorded the final resting position of each toothpick and used the numbers to calculate standard deviation (distance from the mean), you’d find that there is a high probability (about 68%) that a given toothpick will come to rest within one standard deviation of the mean. If you used two standard deviations (double the distance from the mean), you’d find that there is a 95% probability that a toothpick will land within this range, or only a 5% probability that a toothpick will land outside this range.

The trends marked with an asterisk are just like the toothpicks that defied the odds and landed far away from the mean. They represent situations that are out of the ordinary, and thus deserve the attention of every handicapper.


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