David Tan's answer to Nana's Malaysia question.
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Qn 2 working.
For new standard deviation, use formula from this link called Welford's method.
https://math.stackexchange.com/questions/775391/can-i-calculate-the-new-standard-deviation-when-adding-a-value-without-knowing-t
https://jonisalonen.com/2013/deriving-welfords-method-for-computing-variance/
For new standard deviation, use formula from this link called Welford's method.
https://math.stackexchange.com/questions/775391/can-i-calculate-the-new-standard-deviation-when-adding-a-value-without-knowing-t
https://jonisalonen.com/2013/deriving-welfords-method-for-computing-variance/
Date Posted:
3 years ago
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