SOCR EduMaterials AnalysisActivities NormalPower SampleSize - Revision history

IvoDinov at 03:14, 31 January 2008

2008-01-31T03:14:40Z

Annie: /* SOCR Normal Power Analysis Activity: Look for Sample Size, Background */

2007-08-06T22:51:07Z

‎SOCR Normal Power Analysis Activity: Look for Sample Size, Background

Annie: /* SOCR Normal Power Analysis Activity: Look for Sample Size */

2007-08-06T22:43:42Z

‎SOCR Normal Power Analysis Activity: Look for Sample Size

Annie: /* SOCR Normal Power Analysis Activity: Look for Sample Size */

2007-08-06T22:37:28Z

‎SOCR Normal Power Analysis Activity: Look for Sample Size

Annie at 09:02, 6 August 2007

2007-08-06T09:02:09Z

Annie at 08:14, 6 August 2007

2007-08-06T08:14:55Z

New page

<center>[[Image:SOCR_AnalysisActivities_NormalPowerSampleSize_Chu_051707_Fig1.gif|700px]]</center>

<center>[[Image:SOCR_AnalysisActivities_NormalPowerSampleSize_Chu_051707_Fig2.gif|700px]]</center>

<center>[[Image:SOCR_AnalysisActivities_NormalPowerSampleSize_Chu_051707_Fig3.gif|700px]]</center>

<center>[[Image:SOCR_AnalysisActivities_NormalPowerSampleSize_Chu_051707_Fig4.gif|700px]]</center>

@@ Line 1: / Line 1: @@
-=== SOCR Normal Power Analysis Activity: Look for Sample Size, Background ===
+=== [http://socr.ucla.edu/htmls/SOCR_Analyses.html SOCR Normal Power Analysis] Activity: Look for Sample Size, Background ===
 With two parent distributions, both of the same standard deviation ('''sigma'''), and we already know the power we want, we'd like to find the sample size needed. The significance level needs to be provided by the user.
@@ Line 11: / Line 11: @@
 Note that, '''H_A''' can be testing for the cases of '''mu_0 > mu_A''', and '''mu_0 < mu_A'''. The options are also provided by this tool.
-=== SOCR Normal Power Analysis Activity: Look for Sample Size, Example ===
+=== [http://socr.ucla.edu/htmls/SOCR_Analyses.html SOCR Normal Power Analysis] Activity: Look for Sample Size, Example ===
 '''1.''' Click on '''SELECT PARAMETER'''. Be sure that the box '''Get Sample Size Using Power''' is clicked. Have all the fields filled out.

@@ Line 1: / Line 1: @@
 === SOCR Normal Power Analysis Activity: Look for Sample Size, Background ===
-With two parent distributions, both of the same standard deviation (sigma), and we already know the power we want, we'd like to find the sample size needed. The significance level needs to be provided by the user.
+With two parent distributions, both of the same standard deviation ('''sigma'''), and we already know the power we want, we'd like to find the sample size needed. The significance level needs to be provided by the user.
 The two hypotheses are written as:
-H_0: the true mean, mu, is equal to some constant, mu_0.
+'''H_0''': the true mean, '''mu''', is equal to some constant, '''mu_0'''.
-H_A: the true mean, mu, is not equal to mu_0. And we are testing for another possible mean, mu_A.
+'''H_A''': the true mean, '''mu''', is not equal to '''mu_0'''. And we are testing for another possible mean, mu_A.
-Note that, H_A can be testing the cases of mu_0 > mu_A, and mu_0 < mu_A. The options are also provided by this tool.
+Note that, '''H_A''' can be testing for the cases of '''mu_0 > mu_A''', and '''mu_0 < mu_A'''. The options are also provided by this tool.
 === SOCR Normal Power Analysis Activity: Look for Sample Size, Example ===

← Older revision		Revision as of 22:43, 6 August 2007
Line 1:		Line 1:
−	=== SOCR Normal Power Analysis Activity: Look for Sample Size ===	+	=== SOCR Normal Power Analysis Activity: Look for Sample Size, Background ===

		+	With two parent distributions, both of the same standard deviation (sigma), and we already know the power we want, we'd like to find the sample size needed. The significance level needs to be provided by the user.
		+
		+	The two hypotheses are written as:
		+
		+	H_0: the true mean, mu, is equal to some constant, mu_0.
		+
		+	H_A: the true mean, mu, is not equal to mu_0. And we are testing for another possible mean, mu_A.
		+
		+	Note that, H_A can be testing the cases of mu_0 > mu_A, and mu_0 < mu_A. The options are also provided by this tool.
		+
		+
		+	=== SOCR Normal Power Analysis Activity: Look for Sample Size, Example ===
	'''1.''' Click on '''SELECT PARAMETER'''. Be sure that the box '''Get Sample Size Using Power''' is clicked. Have all the fields filled out.		'''1.''' Click on '''SELECT PARAMETER'''. Be sure that the box '''Get Sample Size Using Power''' is clicked. Have all the fields filled out.

← Older revision		Revision as of 22:37, 6 August 2007
Line 17:		Line 17:


−	'''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>

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 <center>[[Image:SOCR_AnalysisActivities_NormalPowerSampleSize_Chu_051707_Fig1.gif|700px]]</center>
 <center>[[Image:SOCR_AnalysisActivities_NormalPowerSampleSize_Chu_051707_Fig2.gif|700px]]</center>
 <center>[[Image:SOCR_AnalysisActivities_NormalPowerSampleSize_Chu_051707_Fig3.gif|700px]]</center>
 <center>[[Image:SOCR_AnalysisActivities_NormalPowerSampleSize_Chu_051707_Fig4.gif|700px]]</center>