Smartphone Ownership The Pew Internet & American Life Project compiles data on smartphone ownership and publishes the results in the document Smartphone Ownership. The first two columns of the following table provide a percentage distribution for the age of U.S. adults. The third column of the table shows the percentage of people in each age group who own a smartphone. | Age group (years) | Percentage of adults | Percentage who own a smartphone | |------------------|----------------------|--------------------------------| | 18–24 | 12.5 | 79 | | 25–34 | 18.0 | 81 | | 35–44 | 16.7 | 69 | | 45–54 | 18.5 | 55 | | 55–64 | 15.4 | 39 | | 65+ | 18.9 | 18 | 1) Create a probability table for the data to answer the following questions. 2) Calculate the probability that a person owns a smartphone, given that he or she is between 18 and 24 years old. 3) Calculate the probability that a person owns a smartphone. 4) Calculate the probability that a person is between 18 and 24 years old, given that he or she owns a smartphone. 5) Interpret your answers to the previous questions 2-4 in terms of a percentage.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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**Smartphone Ownership**

The Pew Internet & American Life Project compiles data on smartphone ownership and publishes the results in the document *Smartphone Ownership*. The first two columns of the following table provide a percentage distribution for the age of U.S. adults. The third column of the table shows the percentage of people in each age group who own a smartphone.

| Age group (years) | Percentage of adults | Percentage who own a smartphone |
|------------------|----------------------|--------------------------------|
| 18–24 | 12.5 | 79 |
| 25–34 | 18.0 | 81 |
| 35–44 | 16.7 | 69 |
| 45–54 | 18.5 | 55 |
| 55–64 | 15.4 | 39 |
| 65+ | 18.9 | 18 |

1) Create a probability table for the data to answer the following questions.

2) Calculate the probability that a person owns a smartphone, given that he or she is between 18 and 24 years old.

3) Calculate the probability that a person owns a smartphone.

4) Calculate the probability that a person is between 18 and 24 years old, given that he or she owns a smartphone.

5) Interpret your answers to the previous questions 2-4 in terms of a percentage.

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