Sec 3/4 E Math T14-Q11 - Reading a cumulative frequency curve

Sec 3/4 E Math T14-Q11 - Reading a cumulative frequency curve

Secondary 3
Original parallel to Sec3&4 E Math FA

The cumulative frequency curve shows 70 recorded times, in minutes.

  1. Use the graph to estimate the median.
  2. Use the graph to estimate the lower and upper quartiles.
  3. Hence, estimate the interquartile range.

Solution:

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Answer:(a) \(28.5\) min; (b) \(19.6\) min and \(38.5\) min; (c) \(18.9\) min.

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