Given Exercise gave the following distribution for X = the number of meals eaten yesterday by individuals in a large population:
|
Meals, X
|
1
|
2
|
3
|
4
|
|
Probability
|
.10
|
.32
|
.56
|
.02
|
a. Calculate the expected value of X.
b. Write a sentence that interprets the expected value of X in this situation.
Exercise
For a large population, probabilities for X = the number of meals eaten yesterday are:
|
Meals, X
|
1
|
2
|
3
|
4
|
|
Probability
|
.10
|
.32
|
.56
|
.02
|
a. Write a table that gives the cumulative probability distribution for X.
b. What is the value of P(X ≤ 2), the probability that a randomly selected person ate two or fewer meals yesterday?