Hypothesis Testing

Hypothesis Testing

What is Hypothesis Testing?

Null Hypothesis A = B

Alternative Hypothesis A ¹ B

We also need to establish:

1) How unequal are these observations?

2) Are these observations reflective of the general population?

Example Hypotheses: Isometric Torque

  • Is there any difference in the length of time that males and females can sustain an isometric muscular contraction?
  • Null Hypothesis ♂ = ♀
  • Alternative Hypothesis ♂ ¹ ♀
  • Is there any difference in the length of time that males and females can sustain an isometric muscular contraction?
  • Alternative Hypothesis (HA) or experimental (HE)
  • There is a significant difference in the DV between males and females.
  • Null Hypothesis (H0)
  • There is not a significant difference in the DV between males and females
  • Is there any difference in the length of time that males and females can sustain an isometric muscular contraction?
  • Useful  analogy- the criminal trial
  • Imagine you are the prosecutor
  • H0 = Defendant not guilty
  • HA = Defendant guilty
  • We must assume that the defendant is innocent until proven guilty.

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hypothesis-t-test.pptx (0.89 MB )