The number of absences per week by workers at a factory has the distribution $$\(\operatorname{Po}(2.1)\)$$. Find the standard deviation of the number of absences per week. ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................
Exam No：9709_w20_qp_63 Year：2020 Question No：5(a)
Answer:
\(\sqrt{2.1}\) or \(1.45(3 \mathrm{sf})\)
Knowledge points:
6.1.2 use the fact that if then the mean and variance of X are each equal to (Proofs are not required.)
Solution:
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