SOCR EduMaterials AnalysisActivities NormalPower SampleSize
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| - | '''4.''' Also click on '''COMPARE CURVES''' to see the population and distribution of mean. | + | '''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. |
<center>[[Image:SOCR_AnalysisActivities_NormalPowerSampleSize_Chu_051707_Fig4.gif|700px]]</center> | <center>[[Image:SOCR_AnalysisActivities_NormalPowerSampleSize_Chu_051707_Fig4.gif|700px]]</center> | ||
Revision as of 22:31, 6 August 2007
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.
2. Click on RESULT to see the result.
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.
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.
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