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Cambridge IGCSE Statistics practice

Which of the following best describes a line of best fit?

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MCQ

Type

cambridge_mcq

Style

Topic

Bivariate distributions

Exam-style question

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Which of the following best describes a line of best fit?.

  1. A.A line that connects all data points
  2. B.A line that shows the general trend of data
  3. C.A line that only touches the highest data point
  4. D.A line drawn randomly on the scatter diagram

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Paper 1 structured question: Bivariate distributions

Paper 1Statistical Techniques5 marks

Data Table

Hours Studied and Marks Obtained

Data pairs showing hours studied and marks obtained by 8 students.

Hours Studied (x)Marks Obtained (y)
250
355
460
565
670
775
880
985
  1. a

    Calculate Use the method of semi-averages to find the equation of the line of best fit in the form y = mx + c.

    Aim for approximately 5 distinct marking points.

    [5]