C I am pretty sure goodluck
Answer:
(a) E(X) = 3
(b) Var(X) = 12.1067
Explanation:
(a) E[X]
E[X]T = E[X]T=A + E[X]T=B + E[X]T=C
= (2.6 + 3 + 3.4)/3
= 2.6 (1/3) + 3(1/3) + 3.4(1/3)
= 2.6/3 + 1 + 3.4/3
= 3
(b) Var (X) = E[X²]−(E[X])²
Recall that if Y ∼ Pois(λ), then E[Y 2] = λ+λ2. This implies that
E[X²] = [(2.6 + 2.6²) + (3 + 3²) + (3.4 + 3.4²)]/3
= (9.36 + 12 + 14.96)/3
= 36.32/3
= 12.1067
Var(X) = E[X²]−(E[X])²
= 12 - 3²
= 12.1067 - 9
= 3.1067
This is an example of a people constraint. A constraint is something that holds you back from completing something. In this scenario, there aren't enough people available to complete all of the projects Rachel is wanting to have completed so there is a people restraint with regards to completing activities.
The answer to this question is Mass murder
One more aspects that needed to be filled to be considered as a mass murder is the intention. It could be considered a mass murder if the killing is purely intentional.
If the killing of four victims happen because of an accident (such as drivig a vehicle toward another and caused the deaths), then the event still not considered as a mass murder.
