Exam-Style Question on Statistics
A mathematics exam-style question with a worked solution that can be revealed gradually
Question id: 214. This question is similar to one that appeared on 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.
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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