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Find the required value of $\sigma$.
Mathematics 9709 · AS & A Level · The normal distribution
The normal distribution — practice question
The masses of bags of sugar are normally distributed with mean $1.04\text{ kg}$ and standard deviation $\sigma\text{ kg}$. In a random sample of $2000$ bags of sugar, $72$ had a mass greater than $1.10\text{ kg}$.
Worked solution & mark scheme
This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Correct normal-table probability, for example $P(X>1.1)=\frac{72}{2000}=0.036$, or the equivalent $z$-values are shown.” …
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