Marks in Exams

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Marks in Exams

• Statistics

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• Scatter Diagrams
• Marks in exams
• The table on the next slide shows the marks
  obtained in exams for 12 pupils in the subjects
  Maths, English and Music.
• All the exams were marked out of 30.

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• We wish to see if there is any connection between
  the Maths marks and the English marks.
• On square paper with Maths marks on the x axis
  and English marks on the y axis plot the points
  using the data in the table. After you have
  plotted the points draw the straight line which
  you think best fits the points.
• Use this line to estimate the English mark for a
  pupil who was absent for the English exam but
  achieved a mark of 10/30 in the Maths exam.
• Repeat the work above to see if there is any
  connection between
• The Maths and the Music exam results.
• The Music and the English results.