Ransha measured the lengths, in centimetres, of 160 palm leaves. His results are illustrated in the cumulative frequency graph below. [Figure with cumulative frequency graph]

1. (i)Estimate how many leaves have a length between 14 and 24 centimetres.[1]
2. (ii)10% of the leaves have a length of L centimetres or more. Estimate the value of L.[2]
3. (iii)Estimate the median and the interquartile range of the lengths.[3]
4. (iv)Sharim measured the lengths, in centimetres, of 160 palm leaves of a different type. He drew a box-and-whisker plot for the data, as shown on the grid below. Compare the central tendency and the spread of the two sets of data.[2]

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.