Business, 05.12.2021 16:20 hayleighhurt

The speed at which you can log into a website through asmartphone is an important quality characteristic of that website. In a recent test, the mean time to log into the JetBlue Airwayswebsite through a smartphone was 4.237 seconds. (Data extractedfrom N. Trejos, “Travelers Have No Patience for Slow MobileSites,” USA Today, April 4, 2012, p. 3B.) Suppose that the downloadtime is normally distributed, with a standard deviation of1.3 seconds. What is the probability that a download time isa. less than 2 seconds?
b. between 1.5 and 2.5 seconds?
c. above 1.8 seconds?
d. Ninety-nine percent of the download times are slower (higher)than how many seconds?
e. Ninety-five percent of the download times are between whattwo values, symmetrically distributed around the mean?

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