4400 Higher November 2010 Paper 3 Q11

EdexcelHigherOld spec5 marksCumulative Frequency

11 The cumulative frequency graph gives information about the lengths of 40 tree branches.

Cumulative frequency graph: cumulative frequency 0 to 40 against length 0 to 60 cm, curve rising from (0, 0) to (55, 40)
(a) Find an estimate for the median length. (2)
(b) Find an estimate for the interquartile range of the lengths. (2)
(c) Find an estimate for the number of branches with lengths of more than 44 cm. (1)
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