The following question i don't understand why my answer is incorrect.
X is an exponential rc, with mean 2. What is the Pr(X < 2.5)?
My answer is - e^( )
The following question i don't understand why my answer is incorrect.
X is an exponential rc, with mean 2. What is the Pr(X < 2.5)?
My answer is - e^( ) That should be minus lambda
and x = 2.5
so - e^(-2*2.5)
P.S
The mean is , so if the mean is 2, then lambda is...