(i)[4]
Use the grid to draw a histogram showing this information.
(ii)[2]
Calculate an estimate for the mean of $t$.
Mathematics 9709 · AS & A Level · Sampling and estimation
Sampling and estimation — practice question
The table summarises the times, $t$ seconds, taken by 1140 people to solve a puzzle.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Frequency density values attempted (at least three correct)” …
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