Drop Log
Idlescape has a community made drop table, it is made possible by data sent in by players. If you want to help out there is currently two different ways you can do it:
Fully Automatic Way
Lootify
This way you get more than just helping out with community data, adds statistical and combat related data such as KPH/GPH
Author: D4M4G3X
Instructions are available here
Lootify is no longer updated
Semi-Automatic Way
This is best if you want an easy way to continuously send in loot logs
Author: Mrkef
Instructions are available on: https://codepen.io/Mrkef/pen/vYXQBrO
Amount of data required
The amount of data required to get a reliable drop rate depends on the "real" drop rate, how close you want to get to the "real" drop rate, and how sure you want to be that the drop rate you found is correct, and not a statistical anomaly.
The following tables lists the sample size (amount of kills needed) required to be 95% sure the drop rate found is correct. This is listed for a number of rarities of items and different accepted distances from the "real" value. Sample size for 10% means you need this sample size to be 95% sure you got within 10% of the real drop rate.
Determined based on two tailed Fisher's exact test using G*power.
Droprate (1 / x) | sample size for 10% | sample size for 50% | sample size for 100% | sample size for 500% | sample size for 1000% |
100 | 272k | 13k | 3932 | 457 | 158 |
500 | 1371k | 66k | 20k | 2383 | 807 |
1500 | 4120k | 200k | 61k | 8025 | 2427 |
5000 | 13m | 669k | 204k | 26k | 9891 |
15000 | 41m | 2008k | 614k | 80k | 29k |