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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.

Statistics

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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