Essay

State the alternative hypothesis for a correlation test in both conceptual terms and mathematical notation, clearly identifying the population parameter used.

Question: State the alternative hypothesis for a correlation test in both conceptual terms and mathematical notation, clearly identifying the population parameter used.

Sample answer: Conceptually, the alternative hypothesis in a test of a correlation coefficient states that a true relationship does exist between the variables within the target population. Mathematically, it is expressed as ρ≠0\rho \neq 0, where the Greek letter rho (ρ\rho) represents the population correlation coefficient, representing a non-zero population correlation.

Key points:

  • The alternative hypothesis states that a true relationship exists between the variables in the target population.
  • The alternative hypothesis is mathematically expressed as ρ≠0\rho \neq 0.
  • The parameter ρ\rho represents the population correlation coefficient.

Rubric: Grading Rubric: - 1 point: States that conceptually the alternative hypothesis posits a true relationship between variables in the target population. - 1 point: Formulates the mathematical expression as ρ≠0\rho \neq 0. - 1 point: Correctly identifies the population parameter ρ\rho (rho).

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Updated 2026-05-26

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Research Methods in Psychology - 4th American Edition @ KPU

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