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Year 12 Maths Advanced (2027) Random variables

Variance & Standard Deviation (Discrete)

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Questions
Question 1
188762
The variance of a discrete random variable \(X\) can be found using:
A.
\(\sum x^{2}P(x)-\mu^{2}\)
B.
\(\sum xP(x)\)
C.
\(\sum (x-\mu)P(x)\)
D.
\(\sqrt{\sum x^{2}P(x)}\)
\(\sum x^{2}P(x)-\mu^{2}\)

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