Question
Assume the number of downloads per day of a popular APP A follows a normally distribution with a mean of 2800 and standard deviation of
Assume the number of downloads per day of a popular APP A follows a normally distribution with a mean of 2800 and standard deviation of 860. Answer the following 4 questions.
- What is the probability there are 2000 or fewer downloads in a day?
- What is the probability there are between 1500 and 2500 downloads in a day?
- What is the probability there are more than 3000 downloads in a day?
Assume the company providing the downloading service has designed itsservers so there is probability 0.01 that the number of downloads in a day exceeds the servers' capacity and more servers have to be brought online.
- How many downloads per day are the servers designed to handle?
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The Commanding Heights The Battle For The World Economy
Authors: Daniel Yergin, Joseph Stanislaw
1st Edition
068483569X, 9780684835693
