2 The masses, in grams, of 400 plums were recorded. The masses were then collected into class intervals of width 5 g and a cumulative frequency graph was drawn, as shown below.
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- Find the number of plums with masses in the interval 40 g to 45 g .
- Find the percentage of plums with masses greater than 70 g .
- Give estimates of the highest and lowest masses in the sample, explaining why their exact values cannot be read from the graph.
- On the graph paper in the answer book, draw a box-and-whisker plot to illustrate the masses of the plums in the sample.
- Comment briefly on the shape of the distribution of masses.