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10 shots · carry & dispersion
Shot Dispersion Notebook
Enter 10 range balls and it shows not just the average but the spread, the landing points, and whether you can judge the difference from last time. It's a tool for not talking about one nice shot.
Checking where it's saved
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What you see now is sample data. It isn't your record. Press "New session" to make your own.
Site owner's records (examples I put into this tool)
PING G440 K (9°): October 24, in a fitting room at a local golf shop, TrackMan, rental club, 15 balls. Average carry 246 yards, from 238 at the lowest to 254 at the highest (spread about ±8 yards). I entered it into this tool at home that night.
Callaway QUANTUM 9° (VENTUS TR RED 6S): October 14, indoor driving range, TrackMan, rental club, 20 balls. Average carry 251 yards.
The gap between the two is 5 yards. The spread of about ±8 yards is bigger, so the tool judged "can't say there's a difference." Both are one-off measurements. The data shown below is sample data, separate from these two.
Session One club, one round of measuring, is a session
Enter 10 balls Left is minus, right is plus (yards)
Carry
Left/right
Head speed
Ball speed
Launch angle
Spin
Carry and left/right are all it needs for the calculations. For the four items to the right of head speed, enter them if your launch monitor shows them (blanks are fine).
Results
Landing points (view from above)
How to read it
The box is the range that holds 90% of your shots (mean ± 1.645 × standard deviation). The narrower it is, the steadier you are. The × marks the average landing point, and the dotted line is your target line. Standard deviation = the size of the spread. About 7 of 10 shots land within "mean ± standard deviation."
Weak points in this record
Compare with last time Checks whether the difference is larger than the spread