Curriculum
Course: Statistics — Third Secondary
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Curriculum

Statistics — Third Secondary

Unit 1: Correlation and Regression

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Unit 2: Advanced Statistical Measures

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Unit 3: Probability

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Unit 4: Random Variables

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Unit 5: The Normal Distribution

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Text lesson

Regression

Statistics — Third Secondary

Regression

Lesson summary

Lesson summary

  • The regression line is the best straight line representing the relationship, found by the method of least squares.
  • The regression equation of y on x is ŷ = a + bx, where b = (n Σxy − Σx Σy) ÷ (n Σx² − (Σx)²) and a = ȳ − b x̄.
  • The line always passes through the point (x̄, ȳ), and the sign of b is the sign of r.
  • Prediction inside the data range is more reliable than prediction outside it.
  • The accuracy of prediction depends on the strength of the correlation.
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