Question: Question 6.53

Suppose that the mean download time for a commercial tax preparation site is 2.0 seconds. Suppose that the download time is normally distributed, with a standard deviation of 0.5 seconds. What is the probability that a download time is

a. less than 2 seconds?

b. Between 1.5 and 2.5 seconds?

c. Above 1.8 seconds?

d. 99% of the download times are slower (higher) than how many seconds?

e. Suppose that the download times are uniformly distributed between 1.5 and 2.5 seconds. What are your answers to (a) through (e)?

f. Compare the results for the IRS site computed in Problem 6.52 to those of the commercial site.