(i)[3]
Estimate the median and the interquartile range of the lengths.
(ii)[1]
Estimate how many caterpillars had lengths from $2$ to $3.5$ cm.
(iii)[2]
$6\%$ of caterpillars were of length $l$ centimetres or above. Estimate $l$.
Mathematics 9709 · AS & A Level · Sampling and estimation
Sampling and estimation — practice question
Anabel recorded the lengths, in centimetres, of 200 caterpillars. Her data are shown on the cumulative frequency graph below.