Abhinav.arjun47 Moradabad, India 1k Questions 2k Answers 14 Best Answers 4k Points View Profile 0 Abhinav.arjun47 Asked: May 7, 20202020-05-07T04:41:36+05:30 2020-05-07T04:41:36+05:30In: General What are the advantages of combined variance? 0 What are the advantages of combined variance? general question Share Facebook 1 Answer Voted Oldest Recent Charu New Delhi, 602 Questions 2k Answers 4 Best Answers 2k Points View Profile Charu Added an answer on May 7, 2020 at 11:17 am Like combined mean, the combined variance or standard deviation can be calculated for different sets of data. Suppose we have two sets of data containing n1 and n2 observations with means X¯¯¯¯1 and X¯¯¯¯2 and variances S12 and S22. If X¯¯¯¯c is the combined mean and Sc2 is the combined variance of n1+n2 observations, then combined variance is given by: Sc2=n1S12+n2S22+n1(X¯¯¯¯1–X¯¯¯¯c)2+n2(X¯¯¯¯2–X¯¯¯¯c)2n1+n2 0 Reply Share Share Share on Facebook Share on Twitter Share on LinkedIn Share on WhatsApp Leave an answerLeave an answerCancel reply Featured image Select file Browse Save my name, email, and website in this browser for the next time I comment.