What is the probability that an interaction lasts longer than 4 minutes with a mean of 3 minutes and a standard deviation of 0.4 minutes
Mathematics
rossd63
Question
What is the probability that an interaction lasts longer than 4 minutes with a mean of 3 minutes and a standard deviation of 0.4 minutes
1 Answer

1. User Answers LammettHash
Assuming interaction duration is normally distributed, you have
[tex]\mathbb P(X>4)=\mathbb P\left(\dfrac{X3}{0.4}>\dfrac{43}{0.4}\right)=\mathbb P(Z>2.5)\approx0.0062[/tex]