Airlines sometimes overbook flights. Suppose that for a plane with 50 seats,55 passengers have tickets. Define the random variable Yas the number of ticketed passengers who actually show up for the flight. The probability mass function of Y appears in the accompanying table. y 45 46 47 48 49 50 51 52 53 54 55 p( y) .05 .10 .12 .14 .25 .17 .06 .05 .03 .02 .01 a. What is the probability that the flight will accommodate all ticketed passengers who show up? b. What is the probability that not all ticketed passengers who show up can be accommodated? c. If you are the first person on the standby list (which means you will be the first one to get on the plane if there are any seats available after all ticketed passengers have been accommodated), what is the probability that you will be able to take the flight? What is this probability if you are the third person on the standby list?
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.
Airlines sometimes overbook flights. Suppose that for a plane with 50 seats,55 passengers have tickets. Define the random variable Yas the number of ticketed passengers who actually show up for the flight. The probability mass
|
y |
45 |
46 |
47 |
48 |
49 |
50 |
51 |
52 |
53 |
54 |
55 |
|
p( y) |
.05 |
.10 |
.12 |
.14 |
.25 |
.17 |
.06 |
.05 |
.03 |
.02 |
.01 |
a. What is the probability that the flight will accommodate all ticketed passengers who show up?
b. What is the probability that not all ticketed passengers who show up can be accommodated?
c. If you are the first person on the standby list (which means you will be the first one to get on the plane if there are any seats available after all ticketed passengers have been accommodated), what is the probability that you will be able to take the flight? What is this probability if you are the third person on the standby list?
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