SMS per day |
---|

2 |

4 |

5 |

5 |

5 |

5 |

6 |

7 |

7 |

8 |

8 |

9 |

10 |

10 |

10 |

10 |

20 |

20 |

25 |

25 |

27 |

The table is a trimmed sample for the number of short message service (SMS) text messages sent per day by twenty-one students surveyed during the spring of 2008.

Helpful tip: Values equal to the class upper limit go into that class. That is, the class upper limit includes data "up to and including the class upper limit."

- __________ What is the level of measurement?
- __________ Find the sample size n.
- __________ Find the minimum.
- __________ Find the maximum.
- __________ Find the range.
- __________ If this data is divided into
**five**classes, what is the width of a single class? - Determine the frequency and calculate the relative frequency using five classes. Record your results in the table provided.

SMS class upper limits | Frequency F | Relative Frequency p(x) |
---|---|---|

Sums: |

- Sketch a
**frequency**histogram of the data, labeling your horizontal axis and vertical axis as appropriate. Use the back of this sheet if necessary. - __________ What is the shape of the histogram?
- __________ If you have a cell phone, about how many text messages do you send per day?
- __________ Do you Twitter?
- __________ Do you blog?
- __________ Do you have a MySpace, FaceBook, Bebo, or other social networking site? If yes, which one: _________________