People visiting video rental stores often rent more than one DVD at a time. The probability distribution for DVD rentals per customer at Entertainment Headquarters is given in the following table. There is a five-video limit per customer, so nobody ever rents more than five DVDs at a time. X (number of DVDs rented) 0 1 2 3 4 5 Probability P(x) 0.35 0.25 0.20 0.10 0.05 0.05 A) What is the expected number of DVDs rented per customer? B) What is the standard deviation of the number of DVD rentals per customer?
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
People visiting video rental stores often rent more than one DVD at a time. The
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X (number of DVDs rented) |
0 |
1 |
2 |
3 |
4 |
5 |
|
Probability P(x) |
0.35 |
0.25 |
0.20 |
0.10 |
0.05 |
0.05 |
A) What is the expected number of DVDs rented per customer?
B) What is the standard deviation of the number of DVD rentals per customer?
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