Statistics and Probability: Data Handling, Interpretation, and Chance
Question 1 of 5
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Free Checkpoint Maths Q & A Practice 1 of 5 free Checkpoint-standard exercises in this section
The frequency diagram shows the time, \(t\) minutes, that \(40\) students spent on homework one evening. Each class includes its upper value, for example \(10\lt t\le20\).

0246810121416102030405060Time, t (minutes)Frequency


Calculate an estimate of the mean time spent on homework.
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