OCR MEI S1 2010 June — Question 3

Exam BoardOCR MEI
ModuleS1 (Statistics 1)
Year2010
SessionJune
TopicData representation
TypeDraw histogram then perform calculations
3 The lifetimes in hours of 90 components are summarised in the table.
Lifetime \(( x\) hours \()\)\(0 < x \leqslant 20\)\(20 < x \leqslant 30\)\(30 < x \leqslant 50\)\(50 < x \leqslant 65\)\(65 < x \leqslant 100\)
Frequency2413142118
  1. Draw a histogram to illustrate these data.
  2. In which class interval does the median lie? Justify your answer.
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