Presentation is loading. Please wait.

Presentation is loading. Please wait.

Hypothesis testing –Revisited A method for deciding whether the sample that you are looking at has been changed by some type of treatment (Independent.

Similar presentations


Presentation on theme: "Hypothesis testing –Revisited A method for deciding whether the sample that you are looking at has been changed by some type of treatment (Independent."— Presentation transcript:

1 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).

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

3 Sample means 81 85 Z scores -2.56 0 H1H1 H1H1 p =.0052.0052 <.025

4 Sample means 81 85 Z scores -2.56 0 H1H1 H1H1 Z = -1.96-2.56 is more extreme than -1.96

5 Sample means 50 52 Z scores 0 1.58 H1H1 H1H1 p =.0571.0571 >.025

6 Sample means 50 52 Z scores 0 1.58 H1H1 H1H1 1.58 is less extreme than 1.96 Z = 1.96


Download ppt "Hypothesis testing –Revisited A method for deciding whether the sample that you are looking at has been changed by some type of treatment (Independent."

Similar presentations


Ads by Google