We are pleased to announce the addition of standard deviation to the statistical data available in Golf Predictor. For those of you unfamiliar with this concept, here are the two pertinent questions (with answers!) that you might be asking yourself:
What is standard deviation?
Standard deviation (SD) is a statistical measure of the dispersion of a set of numbers. A low SD means the numbers are all quite similar, a high one means they are very different. For example, take the number sets (49, 51, 48, 52, 50) and (1, 99, 2, 98, 50). Both sets have an average of 50, but the SD of set 1 is 1.58 while the SD of set 2 is 48.50.
How is standard deviation relevant to Golf Predictor?
When looking at a golfer's results over a period of time, the SD is a measure of how consistent that golfer has been. If his finishing positions are all similar (be they good or bad!), he will have a low SD. Therefore, when it comes to analysing results from the current season/last five events, previous years at the same tournament/on the same course and last 12 similar events, we can use SD to measure consistency.
We have also added SD to the completed season statistics. By looking at the season data since 2003, it becomes apparent that the SD for a golfer can be interpreted roughly as follows:
From this week on (week 16, 2009 - the week of the Madeira Islands Open BPI/Transitions Championship), the season/last 5/historical SD data will be available on the 'Prediction Data' page for each golfer. The season SD is also on the 'Season Data' page for each golfer for every completed season since 2003. In addition, the 'Season History', 'Last 5 History', 'Course History', 'Tournament History', 'Similar tournament History' and 'Season Statistics' pages now also have a sortable SD column and two new charts each. The charts on each of these pages show the most/least consistent golfers in the field (prediction pages) or for the chosen season/tour ('Season Statistics' page). The season SD charts are also accessible from the main 'Tournament Predictions' page.
This has been a major enhancement to Golf Predictor. In addition to the SD features outlined above, consistency has now been added to our prediction algorithm. For example, if all other things are equal and the two golfers have the same season average, the more consistent (the one with the lowest SD) will be ranked as more likely to perform on a given week.
This new functionality brings the total number of available charts in Golf Predictor to 145. As with most of the existing ones, only subscribers can view these new charts. So, sign up today and reap the full benefits of Golf Predictor, the premium professional golf statistics site.
What is standard deviation?
Standard deviation (SD) is a statistical measure of the dispersion of a set of numbers. A low SD means the numbers are all quite similar, a high one means they are very different. For example, take the number sets (49, 51, 48, 52, 50) and (1, 99, 2, 98, 50). Both sets have an average of 50, but the SD of set 1 is 1.58 while the SD of set 2 is 48.50.
How is standard deviation relevant to Golf Predictor?
When looking at a golfer's results over a period of time, the SD is a measure of how consistent that golfer has been. If his finishing positions are all similar (be they good or bad!), he will have a low SD. Therefore, when it comes to analysing results from the current season/last five events, previous years at the same tournament/on the same course and last 12 similar events, we can use SD to measure consistency.
We have also added SD to the completed season statistics. By looking at the season data since 2003, it becomes apparent that the SD for a golfer can be interpreted roughly as follows:
- 0: Perfect consistency (same result every time)*
- Less than 10: Unbelievably consistent
- Between 10 and 20: Very consistent
- Between 20 and 30: fairly consistent
- Between 30 and 40: so-so consistency
- Between 40 and 50: fairly inconsistent
- Between 50 and 60: very inconsistent
- Over 60: All over the place.
From this week on (week 16, 2009 - the week of the Madeira Islands Open BPI/Transitions Championship), the season/last 5/historical SD data will be available on the 'Prediction Data' page for each golfer. The season SD is also on the 'Season Data' page for each golfer for every completed season since 2003. In addition, the 'Season History', 'Last 5 History', 'Course History', 'Tournament History', 'Similar tournament History' and 'Season Statistics' pages now also have a sortable SD column and two new charts each. The charts on each of these pages show the most/least consistent golfers in the field (prediction pages) or for the chosen season/tour ('Season Statistics' page). The season SD charts are also accessible from the main 'Tournament Predictions' page.
This has been a major enhancement to Golf Predictor. In addition to the SD features outlined above, consistency has now been added to our prediction algorithm. For example, if all other things are equal and the two golfers have the same season average, the more consistent (the one with the lowest SD) will be ranked as more likely to perform on a given week.
This new functionality brings the total number of available charts in Golf Predictor to 145. As with most of the existing ones, only subscribers can view these new charts. So, sign up today and reap the full benefits of Golf Predictor, the premium professional golf statistics site.
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