#### Mathematics 2 ESO – Unit 11 AREAS AND VOLUMES page 125 – activity 47

**b)**Relate each chart with a description:

Bar charts a) | 1. The angle for each category = value of the category • 360° / total value of all the categories. |

Pie charts b) | 2. These charts show discrete (discontinuous) data. |

Histograms c) | 3. These charts show continuous data. |

Number of people | Number of times they go to the pool |

12 | 0 |

16 | 1 |

25 | 2 |

12 | 3 |

8 | 4 |

4 | 5 |

2 | 6 |

1 | 7 |

**g)**In a city of 4 million inhabitants we ask eighty people how many times they go to the swimming pool during the first week of July.

- I) What is the population?
- II) What is the sample?
- III) How many categories are there? Which are the categories?
- IV) Which is the absolute frequency of people that goes two times to the pool?
- V) What is the relative frequency of people that goes four times to the pool?
- VI) Draw an appropriate chart.
- VII) Calculate mean, mode and median.