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QLDMath MethodsQuick questions
Unit 2: Calculus and further functions
Quick questions on Discrete probability distributions: QCE Math Methods Unit 2 Year 11
2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is variance formula error?Show answer
$E(X^2) - [E(X)]^2$, not $E(X^2) - E(X)$.
What is missing $\sigma = \sqrt{\text{Var}}$ step?Show answer
Variance is squared; standard deviation requires the square root.
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