# 8.3.1. Collecting and Organizing Data

Below are the scores of 30 students in an exam:

3 | 18 | 6 | 13 | 19 | 15 | 7 | 12 | 10 | 15 |

10 | 12 | 13 | 2 | 12 | 10 | 14 | 11 | 10 | 15 |

14 | 16 | 3 | 15 | 2 | 11 | 14 | 15 | 15 | 7 |

Complete the following frequency table with the correct frequencies.

Scores | 2– | 5– | 8– | 11– | 14– | 17– | Total |
---|---|---|---|---|---|---|---|

Frequency | 30 |

- A4, 3, 4, 7, 10, 2
- B4, 3, 6, 8, 7, 2
- C2, 0, 0, 2, 3, 0
- D4, 1, 2, 9, 11, 3

### Example

Below are the scores of 30 students in an exam:

3 | 18 | 6 | 13 | 19 | 15 | 7 | 12 | 10 | 15 |

10 | 12 | 13 | 2 | 12 | 10 | 14 | 11 | 10 | 15 |

14 | 16 | 3 | 15 | 2 | 11 | 14 | 15 | 15 | 7 |

Complete the following frequency table with the correct frequencies.

Scores | 2– | 5– | 8– | 11– | 14– | 17– | Total |
---|---|---|---|---|---|---|---|

Frequency | 30 |

### Solution

Count the number of scores for each set.

Using the previous data, the frequency table for the weekly wages can be completed as follows:

Scores | Total | ||||||
---|---|---|---|---|---|---|---|

Frequency | 4 | 3 | 4 | 7 | 10 | 2 | 30 |