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The speed at which you can log into a website through a smartphone is an important quality characteristic of that website. In a recent test, the mean time to log into the JetBlue Airways website through a smartphone was 4.237 seconds. Suppose that the download time is normally distributed, with a standard deviation of 1.3 seconds. What is the probability that the 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. 95% of the download times are between what two values, symmetrically distributed around the mean?

F. Suppose that the download times are uniformly distributed between 1 and 9 seconds. What are your answers to A through C?

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