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Determine the standard deviation.
Mathematics 9709 · AS & A Level · Continuous random variables
Continuous random variables — practice question
For a normal distribution with mean $9.3$, the chance that a value chosen at random is above $5.6$ is $0.85$.
Worked solution & mark scheme
This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Apply $z=-1.036$ in the equation $z=\frac{5.6-9.3}{\sigma}$ (or an equivalent form) with the relevant values substituted” …
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