s2 normal distribution HELP
The random variable x has a normal distribution. The mean μ (where μ>0) and the variance 1/4μ^2.
(a) Find p(X>1.5μ)
I am having trouble with this question so far I have got...
P(z>2/μ)
(a) Find p(X>1.5μ)
I am having trouble with this question so far I have got...
P(z>2/μ)
anyone?
Original post by Butterflyshy
The random variable x has a normal distribution. The mean μ (where μ>0) and the variance 1/4μ^2.
(a) Find p(X>1.5μ)
I am having trouble with this question so far I have got...
P(z>2/μ)
(a) Find p(X>1.5μ)
I am having trouble with this question so far I have got...
P(z>2/μ)
You divided by the variance, rather than the s.d.
Original post by ghostwalker
You divided by the variance, rather than the s.d.
I now get p(z>1), 1-p(z<1) which is 1-0.8413 which is 0.1587 which is the answer. Thanks for your help
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