## Exam Style Question## Worked solutions to typical exam type questions that you can reveal gradually |

Question id: 214. This question is similar to one that appeared in a GCSE Higher paper (specimen) for 2017. The use of a calculator is allowed.

The following table shows the number of times people in a sample group visited the cinema in a six month period.

One of the frequencies is missing.

Cinema Visits | Frequency | Midpoint | |
---|---|---|---|

0-4 | 20 | 2 | |

5-9 | 24 | 7 | |

10-14 | 12 | ||

15-19 | 7 | 17 |

Midpoints are used to work out an estimate for the mean number of visits.

The mean is calculated to be 7.25.

Work out the missing frequency.

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