A store manager gathers some demographic information from the store's customers. The following chart summarizes the age-related information they collected: Age Number of Customers <20<20 55 20-29 56 30-39 67 40-49 77 50-59 53 ≥60≥60 60 One customer is chosen at random for a prize giveaway. (Round answers to 4 decimal places.)a. What is the probability that the customer is at least 20 but no older than 39? b. What is the probability that the customer is either older than 39 or younger than 20? c. What is the probability that the customer is at least 50?
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.
A store manager gathers some demographic information from the store's customers. The following chart summarizes the age-related information they collected:
| Age | Number of Customers |
|---|---|
| <20<20 | 55 |
| 20-29 | 56 |
| 30-39 | 67 |
| 40-49 | 77 |
| 50-59 | 53 |
| ≥60≥60 | 60 |
One customer is chosen at random for a prize giveaway. (Round answers to 4 decimal places.)
a. What is the probability that the customer is at least 20 but no older than 39?
b. What is the probability that the customer is either older than 39 or younger than 20?
c. What is the probability that the customer is at least 50?
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