Available under Creative Commons-ShareAlike 4.0 International License. Download for free at http://cnx.org/contents/733d1554-5d75-4798-9e54-7dcdc1ee5690@5.40

**Exercise 1.6.1**

In your class, have someone conduct a survey of the number of siblings (brothers and sisters) each student has. Create a frequency table. Add to it a relative frequency column and a cumulative relative frequency column. Answer the following questions:

- What percentage of the students in your class has 0 siblings?
- What percentage of the students has from 1 to 3 siblings?
- What percentage of the students has fewer than 3 siblings?

**Example 1.9**

Nineteen people were asked how many miles, to the nearest mile they commute to work each day.

The data are as follows: 2; 5; 7; 3; 2; 10; 18; 15; 20; 7; 10; 18; 5; 12; 13; 12; 4; 5; 10

The following table was produced:

DATA | FREQUENCY | RELATIVE FREQUENCY | CUMULATIVE RELATIVE FREQUENCY |

3 | 3 | 0.1579 | |

4 | 1 | 0.2105 | |

5 | 3 | 0.1579 | |

7 | 2 | 0.2632 | |

10 | 3 | 0.4737 | |

12 | 2 | 0.7895 | |

13 | 1 | 0.8421 | |

15 | 1 | 0.8948 | |

18 | 1 | 0.9474 | |

20 | 1 | 1.0000 |

**Problem**

- Is the table correct? If it is not correct, what is wrong?
- True or False: Three percent of the people surveyed commute 3 miles. If the statement is not correct, what should it be? If the table is incorrect, make the corrections.
- What fraction of the people surveyed commute 5 or 7 miles?
- What fraction of the people surveyed commute 12 miles or more? Less than 12 miles? Between 5 and 13 miles (does not include 5 and 13 miles)?

- 瀏覽次數：4464