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Hypothesis testing –Revisited

A method for deciding whether the sample that you are looking at has been changed by some type of treatment (Independent Variable IV) Looking at how likely it is that a sample like the one that you have would be selected at random (without the benefit of treatment). Hypothesis testing –Revisited.

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Hypothesis testing –Revisited

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  1. A method for deciding whether the sample that you are looking at has been changed by some type of treatment (Independent Variable IV) Looking at how likely it is that a sample like the one that you have would be selected at random (without the benefit of treatment). Hypothesis testing –Revisited

  2. Sampling Distribution Frequency How many samples x  Mean values of all possible samples.

  3. H1 H1 Sample means 81 85 Z scores -2.56 0 p = .0052 .0052 < .025

  4. H1 H1 Sample means 81 85 Z scores -2.56 0 Z = -1.96 -2.56 is more extreme than -1.96

  5. H1 H1 Sample means 50 52 Z scores 0 1.58 p = .0571 .0571 > .025

  6. H1 H1 Sample means 50 52 Z scores 0 1.58 Z = 1.96 1.58 is less extreme than 1.96

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