SOCR EduMaterials AnalysisActivities NormalPower SampleSize
SOCR Normal Power Analysis Activity: Look for Sample Size
1. Click on SELECT PARAMETER. Be sure that the box Get Sample Size Using Power is clicked. Have all the fields filled out.
Error creating thumbnail: File missing
2. Click on RESULT to see the result.
Error creating thumbnail: File missing
3. Then Click on GRAPH to see function of possible values of power. Note that five curves will be given, one of them has the calculated sample size, and the other four curves correspond to sample size adding 10, 20, 30 and 40.
Error creating thumbnail: File missing
4. Also click on COMPARE CURVES to see the population and distribution of mean. The normal curve with yellow area shows the distribution of the alternative mean, with power. You can dynamically change the power by holding and dragging the yellow area. And of course, this changes the mean of the alternative hypothesis.
Error creating thumbnail: File missing
Translate this page:
