OCR MEI S1 2014 June — Question 1

Exam BoardOCR MEI
ModuleS1 (Statistics 1)
Year2014
SessionJune
TopicData representation
TypeDraw cumulative frequency graph from frequency table

1 The ages, \(x\) years, of the senior members of a running club are summarised in the table below.
Age \(( x )\)\(20 \leqslant x < 30\)\(30 \leqslant x < 40\)\(40 \leqslant x < 50\)\(50 \leqslant x < 60\)\(60 \leqslant x < 70\)\(70 \leqslant x < 80\)\(80 \leqslant x < 90\)
Frequency10304223951
  1. Draw a cumulative frequency diagram to illustrate the data.
  2. Use your diagram to estimate the median and interquartile range of the data.