A company that rents DVDs from vending machines in grocery stores has developed the following probability distribution for the random variable X = the number of DVDs a customer rents per visit to a machine. X 1 2 3 4 P(X) 0.5 0.3 0.1 0.1 a) Find and interpret the mean (expected value) of X.
A company that rents DVDs from vending machines in grocery stores has developed the following probability distribution for the random variable X = the number of DVDs a customer rents per visit to a machine. X 1 2 3 4 P(X) 0.5 0.3 0.1 0.1 a) Find and interpret the mean (expected value) of X.
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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Question
- A company that rents DVDs from vending machines in grocery stores has developed the following probability distribution for the random variable X = the number of DVDs a customer rents per visit to a machine.
X |
1 |
2 |
3 |
4 |
P(X) |
0.5 |
0.3 |
0.1 |
0.1 |
- a) Find and interpret the
mean (expected value ) of X.
- b) Find and interpret the standard deviation of X.
- c) What is the probability that a customer rents more than 2 DVDs per visit to a machine?
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