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Find the probability that the sample mean is below $2.88$.
Mathematics 9709 · AS & A Level · Sampling and estimation
Sampling and estimation — practice question
$X$ has distribution $\text{Po}(2.90)$. A random sample of 100 observations of $X$ is selected.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Suitable normal model $\bar{X} \sim N(2.9, \frac{2.9}{100})$ or totals method $N(290,290)$” …
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