Let W denote a random variable that has a Poisson distribution with mean= 2. Find
a. P(W = 2),
b. P(W 3), and
c. P(W 3jW 1).
The New York Times reported that the mean time to download the IRS home-page is 0.8 seconds. Suppose that the download time is normally distributed with a standard deviation of 0.2 seconds.
a. What is the probability that a download time is less than 1 second?
b. What is the probability that a download time is between 0.5 and 1.5 seconds?