Consider the following frequency distribution of daily sales for a shop that was kept for the months of
November and December in 2013.
Daily Sales ($) 60-70 70-80 80-90 90-100 100-110 110-120
Number of days 5 11 22 13 7 3
a. From this frequency distribution,
(i) draw a histogram. [4]
(ii) draw a frequency polygon . [4]
(iii) draw the corresponding ‘less than’ cumulative frequency curve. [5]
(iv) calculate the mode. [4]
(v) calculate the median and state how it compares with the estimate from part (d). [5]
b. Using the ogive in part a(iii) above, estimate the median daily sales for this shop. [4]
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