Moderate -0.8 This is a straightforward Poisson probability calculation requiring only the complement rule and basic formula application. Students need to calculate P(Y>1) = 1 - P(Y≤1) = 1 - [P(Y=0) + P(Y=1)] using the standard Poisson formula with λ=3. The multiple-choice format and single calculation step make this easier than average, though it's from Further Maths so the baseline is slightly higher.
2 The discrete random variable \(Y\) has a Poisson distribution with mean 3
Find the value of \(\mathrm { P } ( Y > 1 )\) to three significant figures.
Circle your answer.
\(0.149 \quad 0.199 \quad 0.801 \quad 0.950\)
2 The discrete random variable $Y$ has a Poisson distribution with mean 3
Find the value of $\mathrm { P } ( Y > 1 )$ to three significant figures.\\
Circle your answer.\\
$0.149 \quad 0.199 \quad 0.801 \quad 0.950$
\hfill \mbox{\textit{AQA Further AS Paper 2 Statistics 2018 Q2 [1]}}