4400 Higher November 2007 Paper 4 Q16

EdexcelHigherOld spec4 marksCumulative Frequency

16 The cumulative frequency graph gives information about the adult literacy rates of 52 countries in Africa. The adult literacy rates are expressed as percentages of the adults in the countries.

Cumulative frequency graph: cumulative frequency 0 to 50 against adult literacy rate 0 to 100 per cent; the curve rises to 52 at 90 per cent
(a) Use the cumulative frequency graph to find an estimate for the number of these 52 countries which have an adult literacy rate of
(i) less than 40%,
(ii) more than 75%. (2)
(b) Find an estimate for the median adult literacy rate for these 52 countries. (2)
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