Easy -1.2 This is a direct application of a standard variance transformation formula Var(aX+b) = a²Var(X), requiring only recall that constants don't affect variance and multiplication by 'a' squares the variance. It's a single-step calculation (4² × 6.5 = 104) with multiple choice format, making it easier than average even for Further Maths.
1 The discrete random variable \(X\) has \(\operatorname { Var } ( X ) = 6.5\)
Find \(\operatorname { Var } ( 4 X - 2 )\)
Circle your answer.
2426102104
1 The discrete random variable $X$ has $\operatorname { Var } ( X ) = 6.5$\\
Find $\operatorname { Var } ( 4 X - 2 )$
Circle your answer.\\
2426102104
\hfill \mbox{\textit{AQA Further AS Paper 2 Statistics 2021 Q1 [1]}}