Originally Posted by
bart123456 hey
I'm stuck on one of the question in our online test in statistics:
Suppose that X ε [1,2,..., ] is discrete random variable that follows a geometric distribution with mean 3.74.
What is the probability that X is an even number?
Give your solution accurate to 4 decimal places.
my idea was:
from geometric sequence:
x=1/theta
so:
3.14=1/theta -> theta=0.26737968
and then use P(X=x)=(1-theta)^x-1 * theta
to get P=0.1373945
however don't know if that's what the question is asking about (i.e what is the 'successs' in this geometric distribution, number being even?) another idea was to put:
P(X=2x), if that makes any sense, to account for the number being even however don't know how to go from there
any thoughts?
would appreciate any help