Power Analysis for Normal Distribution: - Revision history

IvoDinov: Redirecting to Power Analysis for Normal Distribution

2008-02-10T04:32:31Z

Redirecting to Power Analysis for Normal Distribution

IvoDinov at 04:31, 10 February 2008

2008-02-10T04:31:22Z

IvoDinov at 06:01, 19 January 2007

2007-01-19T06:01:06Z

Annie: /* A. Without Generating Raw Data */

2006-10-27T02:26:22Z

‎A. Without Generating Raw Data

Annie: /* How to do part (2) and what's in there? */

2006-10-27T02:25:31Z

‎How to do part (2) and what's in there?

Annie: /* B. With Raw Data Generated */

2006-10-27T02:24:49Z

‎B. With Raw Data Generated

Annie: /* A. Without Generating Raw Data */

2006-10-27T02:23:00Z

‎A. Without Generating Raw Data

Annie: /* A. Without Generating Raw Data */

2006-10-27T02:22:38Z

‎A. Without Generating Raw Data

Annie: /* A. Without Generating Raw Data */

2006-10-27T02:22:06Z

‎A. Without Generating Raw Data

Annie: /* A. Without Generating Raw Data */

2006-10-27T02:20:24Z

‎A. Without Generating Raw Data

← Older revision		Revision as of 04:32, 10 February 2008
Line 1:		Line 1:
−	~~== List of Functionalities ==~~	+	#REDIRECT [[Power_Analysis_for_Normal_Distribution]]
−	~~=== Finding Power with Sample Size ("Part 1")===~~
−	~~Finding power, with given information (including the sample size, standard deviation (SD), mean of the null (mu_0) and alternative (mu_A) hypothesis, significance level and hypothesis type).~~
−
−	~~=== Finding Sample Size with Power ("Part 2")===~~
−	~~Finding sample size, with given information (including the power, standard deviation, mean of the null and alternative hypothesis, significance level and hypothesis type).~~
−
−
−	~~=== Finding Z-Score ("Part 3") ===~~
−	~~Finding the z-score with given information (including the mean, standard deviation, and the specific point of interest).~~
−
−
−	~~=== Details of Computation Steps ===~~
−
−	~~==== How to do part (1) and what's in there? ====~~
−
−	~~You can do part (1) in two ways:~~
−
−	~~=====A. Without Generating Raw Data=====~~
−	Just click on "SELECT PARAMETERS". Make sure "Get Power Using Sample Size" is selected. Then input the information stated above in (1). You'll need to: input all these in order for the program to continue. Remember to select one from the three hypothesis types, i.e., set the relationship of the null and alternative's means, to be less than, greater than, or not equal.
−	~~<center>~~[[~~Image:SOCR_Analyses_NormalPower_SelectPanel_SampleSize_Annie_20061026_1.jpg\|550px]]</center>~~
−
−	Then click on the '''CALCULATE''' button to get the computed results. Then you could click on the "RESULT" button to see the statistical output, and click on "GRAPH" tab to see a plot of "power vs. mean."
−
−	~~<center>[[Image:SOCR_Analyses_NormalPower_GraphPanel_SampleSize_Annie_20061026_1.jpg\|550px]]</center>~~
−
−	~~Click on '''COMPARE CURVES''' to see the normal curves. The top curve is generated using the SD inputted, and the bottom curve using the SE of sample mean.~~
−
−	~~<center>[[Image:SOCR_Analyses_NormalPower_CompareCurves_RawData_Annie_20061026_2.jpg\|550px]]</center>~~
−
−	~~=====B. With Raw Data Generated =====~~
−	~~To see how this work with data, click on '''RANDOM EXAMPLE''' and a set of data will be generated.~~
−	~~Click on the "DATA" tab if you would like to see the data.~~
−
−	~~<center>[[Image:SOCR_Analyses_NormalPower_DataPanel_SampleSize_Annie_20061026_2.jpg\|550px]]</center>~~
−
−	~~Then go to '''SELECT PARAMETER''' panel. Make sure "''Get Power Using Sample Size''" is selected, and input the information stated above in (1).~~
−
−	~~<center>[[Image:SOCR_Analyses_NormalPower_SelectPanel_SampleSize_Annie_20061026_2.jpg\|550px~~]]~~</center>~~
−
−	Click on the '''CALCULATE''' button to obtain the mean and SD of this data set. Next input your own mean of alternative hypothesis. Remember to select hypothesis type. Then, click on the "CALCULATE" button ''AGAIN'', to obtain the result, graph, and normal curves, as in (A).
−
−	~~<center>[[Image:SOCR_Analyses_NormalPower_CompareCurves_RawData_Annie_20061026_1.jpg\|550px]]</center>~~
−
−	~~Note that in (B)'s normal curve, the data are plotted in pink (based on frequency).~~
−
−	For both (A) and (B), you can move around the curve of sample mean, alternative hypothesis (bottom panel, red curve), by clicking inside its area. The part(s) that's rejected by the null hypothesis, is painted yellow.
−
−	~~==== How to do part (2) and what's in there? ====~~
−
−	~~Very similar to 1A: just click on '''SELECT PARAMETERS'''.~~
−
−	~~<center>[[Image:SOCR_Analyses_NormalPower_SelectPanel_Power_Annie_20061026_1.jpg\|550px]]</center>~~
−
−	Make sure "''Get Sample Size Using Power''" is selected. And input the information stated above in (2). Instead of specifying the sample size, you specify the power. Use a decimal number between 0 and 1 (e.g. 0.95). You'll need to input all these in order for the program to continue. Remember to select one from the three hypothesis types. Then, once you click on the "CALCULATE" button, see the result, graph and normal curves by clicking on '''RESULT''', '''GRAPH''' and '''COMPARE CURVES''' tabs.
−
−	~~You can move around the curve of sample mean, alternative hypothesis (bottom panel, red curve),~~
−	~~by clicking on it's area inside. The part(s) that's rejected by the null hypothesis, is painted yellow.~~
−
−	~~==== How to do part (3) and what's in there? ====~~
−
−	~~This is even easier than (1) and (2). Just click on '''SELECT PARAMETERS''', enter all the information, then click on '''CALCULATE'''. Then click on '''RESULT''' for the result.~~
−
−	~~{{translate\|pageName=http://wiki.stat.ucla.edu/socr/index.php?title=Power_Analysis_for_Normal_Distribution}}~~

@@ Line 1: / Line 1: @@
 == List of Functionalities ==
 === Finding Power with Sample Size ("Part 1")===
-finding power, with given information (including the sample size, standard deviation (SD), mean of the null (mu_0) and alternative (mu_A) hypothesis, significance level and hypothesis type).
+Finding power, with given information (including the sample size, standard deviation (SD), mean of the null (mu_0) and alternative (mu_A) hypothesis, significance level and hypothesis type).
 === Finding Sample Size with Power ("Part 2")===
-finding sample size, with given information (including the power, standard deviation, mean of the null and alternative hypothesis, significance level and hypothesis type).
+Finding sample size, with given information (including the power, standard deviation, mean of the null and alternative hypothesis, significance level and hypothesis type).
 === Finding Z-Score ("Part 3") ===
-finding the z-score with given information (including the mean, standard deviation, and the specific point of interest).
+Finding the z-score with given information (including the mean, standard deviation, and the specific point of interest).
@@ Line 17: / Line 17: @@
 You can do part (1) in two ways:
-=====A. Without Generating Raw Data===== just click on "SELECT PARAMETERS".  Make sure "Get Power Using Sample Size " is selected. and input the information stated above in (1). You'll need to:
+=====A. Without Generating Raw Data=====
-input all these in order for the program to continue. Remember to select one from the three
+Just click on "SELECT PARAMETERS".  Make sure "Get Power Using Sample Size" is selected. Then input the information stated above in (1). You'll need to: input all these in order for the program to continue. Remember to select one from the three hypothesis types, i.e., set the relationship of the null and alternative's means, to be less than, greater than, or not equal.
-hypothesis types, i.e. set the relationship of the null and alternative's means, to be less than,
+<center>[[Image:SOCR_Analyses_NormalPower_SelectPanel_SampleSize_Annie_20061026_1.jpg|550px]]</center>
-Then click on the "CALCULATE" button to get
+Then click on the '''CALCULATE''' button to get the computed results. Then you could click on the "RESULT" button to see the statistical output, and click on "GRAPH" tab to see a plot of "power vs. mean."
-[[Image:SOCR_Analyses_NormalPower_GraphPanel_SampleSize_Annie_20061026_1.jpg|550px]]
+<center>[[Image:SOCR_Analyses_NormalPower_GraphPanel_SampleSize_Annie_20061026_1.jpg|550px]]</center>
-Click on "COMPARE CURVES" to see
+Click on '''COMPARE CURVES''' to see the normal curves. The top curve is generated using the SD inputted, and the bottom curve using the SE of sample mean.
-[[Image:SOCR_Analyses_NormalPower_CompareCurves_RawData_Annie_20061026_2.jpg|550px]]
+<center>[[Image:SOCR_Analyses_NormalPower_CompareCurves_RawData_Annie_20061026_2.jpg|550px]]</center>
-=====B. With Raw Data Generated ===== To see how this work with data, click on "RANDOM EXAMPLE" and a set of data will be generated.
+=====B. With Raw Data Generated =====
 Click on the "DATA" tab if you would like to see the data.
-[[Image:SOCR_Analyses_NormalPower_DataPanel_SampleSize_Annie_20061026_2.jpg|550px]]
+<center>[[Image:SOCR_Analyses_NormalPower_DataPanel_SampleSize_Annie_20061026_2.jpg|550px]]</center>
-Then go to "SELECT PARAMETER" panel. Make sure "Get Power Using Sample Size " is selected, and input the information stated above in (1).
+Then go to '''SELECT PARAMETER''' panel. Make sure "''Get Power Using Sample Size''" is selected, and input the information stated above in (1).
-[[Image:SOCR_Analyses_NormalPower_SelectPanel_SampleSize_Annie_20061026_2.jpg|550px]]
+<center>[[Image:SOCR_Analyses_NormalPower_SelectPanel_SampleSize_Annie_20061026_2.jpg|550px]]</center>
-Click on the "CALCULATE" button to obtain the mean and SD of this data set. Next input your own mean
+Click on the '''CALCULATE''' button to obtain the mean and SD of this data set. Next input your own mean of alternative hypothesis. Remember to select hypothesis type. Then, click on the "CALCULATE" button ''AGAIN'', to obtain the result, graph, and normal curves, as in (A).
-[[Image:SOCR_Analyses_NormalPower_CompareCurves_RawData_Annie_20061026_1.jpg|550px]]
+<center>[[Image:SOCR_Analyses_NormalPower_CompareCurves_RawData_Annie_20061026_1.jpg|550px]]</center>
-Note that in (B)'s normal curve, the data are ploted in pink (based on frequency).
+Note that in (B)'s normal curve, the data are plotted in pink (based on frequency).
-For both (A) and (B), You can move around the curve of sample mean, alternative hypothesis (bottom panel, red curve),
+For both (A) and (B), you can move around the curve of sample mean, alternative hypothesis (bottom panel, red curve), by clicking inside its area. The part(s) that's rejected by the null hypothesis, is painted yellow.
 ==== How to do part (2) and what's in there? ====
-Very similar to 1A: just click on "SELECT PARAMETERS".
+Very similar to 1A: just click on '''SELECT PARAMETERS'''.
-[[Image:SOCR_Analyses_NormalPower_SelectPanel_Power_Annie_20061026_1.jpg|550px]]
+<center>[[Image:SOCR_Analyses_NormalPower_SelectPanel_Power_Annie_20061026_1.jpg|550px]]</center>
-Make sure "Get Sample Size Using Power" is selected. And input the information stated above in (2).
+Make sure "''Get Sample Size Using Power''" is selected. And input the information stated above in (2).  Instead of specifying the sample size, you specify the power. Use a decimal number between 0 and 1 (e.g. 0.95). You'll need to input all these in order for the program to continue. Remember to select one from the three hypothesis types. Then, once you click on the "CALCULATE" button, see the result, graph and normal curves by clicking on '''RESULT''', '''GRAPH''' and '''COMPARE CURVES''' tabs.
 You can move around the curve of sample mean, alternative hypothesis (bottom panel, red curve),
-by click on it's area inside. The part(s) that's rejected by the null, is painted yellow.
+by clicking on it's area inside. The part(s) that's rejected by the null hypothesis, is painted yellow.
 ==== How to do part (3) and what's in there? ====
-This is even easier than (1) and (2). Just click on "SELECT PARAMETERS", enter all the information,
+This is even easier than (1) and (2). Just click on '''SELECT PARAMETERS''', enter all the information, then click on '''CALCULATE'''. Then click on '''RESULT''' for the result.
 {{translate|pageName=http://wiki.stat.ucla.edu/socr/index.php?title=Power_Analysis_for_Normal_Distribution}}

← Older revision		Revision as of 06:01, 19 January 2007
Line 71:		Line 71:
	This is even easier than (1) and (2). Just click on "SELECT PARAMETERS", enter all the information,		This is even easier than (1) and (2). Just click on "SELECT PARAMETERS", enter all the information,
	then click on "CALCULATE". Then click on "RESULT" for the result.		then click on "CALCULATE". Then click on "RESULT" for the result.
		+
		+
		+	{{translate\|pageName=http://wiki.stat.ucla.edu/socr/index.php?title=Power_Analysis_for_Normal_Distribution}}

@@ Line 25: / Line 25: @@
 Then click on the "CALCULATE" button to get
 the computed results. Then you could click on the "RESULT" button to see the statistical output, and
-click on "GRAPH" tab to see a plot of "power vs. mean", and click on "COMPARE CURVES" to see
+click on "GRAPH" tab to see a plot of "power vs. mean."
 the normal curves. The top curve is generated using the SD inputted, and the bottom curve using the SE of sample mean.

@@ Line 52: / Line 52: @@
 ==== How to do part (2) and what's in there? ====
-Very similar to 1A: just click on "SELECT PARAMETERS". Make sure "Get Sample Size Using Power" is selected. And input the information stated above in (2).
+Very similar to 1A: just click on "SELECT PARAMETERS".
 Instead of specifying the sample size, you specify the power. Use a decimal number beteen 0 and 1 (e.g. 0.95). You'll need toinput all these in order for the program to continue. Remember to select one from the three hypothesis types. Then, once you click on the "CALCULATE" button, see the result,
 graph and normal curves by clicking on "RESULT", "GRAPH" and "COMPARE CURVES" tabs.