Posted by Sam on Sunday, October 27, 2013 at 6:50pm.
The random variable X has a lognormal distribution, when the mean of ln(X) = 5.45 and variance of ln(X) = 0.334,
what is the probability that X >139.76?

Math/Probability  Steve, Monday, October 28, 2013 at 12:10am
ln(139.76) = 4.94
So, just look up Z>(4.945.45)/0.334