ALG1.MATH.4.A

Calculate, using technology, the correlation coefficient between two quantitative variables and interpret this quantity as a measure of the strength of the linear association.

Algebra I · Texas Essential Knowledge and Skills (TEKS) · TEKS 2012

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Vocabulary
correlation coefficienttechnologyquantitative variablesmeasurestrengthlinear association
Skills
  • calculate (correlation coefficient between two quantitative variables using technology) #dok2
  • interpret (correlation coefficient as a measure of strength of linear association) #dok3
  • analyze (the relationship between two quantitative variables) #dok3
  • justify (the reasonableness of a calculated correlation coefficient in context) #dok4
Learning Targets
  • I can use technology to calculate the correlation coefficient between two quantitative variables. #dok2
  • I can describe what the correlation coefficient tells us about the relationship between two variables. #dok2
  • I can interpret the value of the correlation coefficient as the strength of a linear association. #dok3
  • I can analyze real-world data sets to determine the strength of their linear associations. #dok3
  • I can justify whether a calculated correlation coefficient makes sense, given the context of the data. #dok4
Big Ideas
  • The correlation coefficient is a numerical measure that represents the strength and direction of a linear relationship between two quantitative variables.
  • Technology can be used to efficiently calculate and interpret the correlation coefficient, allowing for meaningful analysis of real-world data sets.
Essential Questions
  • What is the correlation coefficient and what does it measure?
  • How can technology help us find and interpret the correlation coefficient for a set of data?
  • How do you know if two variables have a strong, weak, or no linear association?
  • In what real-world situations would it be important to measure the correlation between two variables?
  • How can you decide if a calculated correlation coefficient is reasonable based on the context?