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?
A logistic company determined the distance traveled per truck per year follows a normally distribution with a mean of 50 thousand miles and standard deviation of 12 thousand miles. Answer the following 3 questions.
- What proportion of trucks travel between 35 and 50 thousand miles?
- What proportion of trucks travel less than 30 or more than 60 thousand miles?
- About 95% of trucks travel at least how many thousand miles?
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Business Intelligence
Authors: Jerzy Surma
1st Edition
1606491857, 9781606491850
