[SPARK-9673] Use unbiased standard deviation in DataFrame.describe

• Type: Improvement
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 1.5.0
• Component/s: SQL
• Target Version/s: 1.6.0
• Assignee: Burak Yavuz
• Reporter: Xiangrui Meng
• Created: 06/Aug/15 00:37
• Updated: 05/Nov/15 23:16
• Resolved: 05/Nov/15 23:16

Description

It is common to compute unbiased standard deviation in statistics. Though is doesn't matter much for big data, it is nice to be consistent with existing statistics tools.

Issue Links

• links to: [Github] Pull Request #8058 (brkyvz)