FrankChen021 commented on code in PR #12470:
URL: https://github.com/apache/druid/pull/12470#discussion_r855791243
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docs/development/extensions-core/stats.md:
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@@ -35,10 +35,13 @@ The American Statistician, 37 (1983) pp. 242--247.
variance = variance1 + variance2 + n/(m*(m+n)) * pow(((m/n)*t1 - t2),2)
-where: - variance is sum(x-avg^2) (this is actually n times the variance)
-and is updated at every step. - n is the count of elements in chunk1 - m is
-the count of elements in chunk2 - t1 = sum of elements in chunk1, t2 =
-sum of elements in chunk2.
+where:
+ - variance is sum(x-avg^2) (this is actually n times the variance)
+and is updated at every step.
+ - n is the count of elements in chunk1
+ - m is the count of elements in chunk2
+ - t1 = sum of elements in chunk1
+ - t2 = sum of elements in chunk2.
Review Comment:
```suggestion
- t2 is the sum of elements in chunk2
```
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