Difference between revisions of "TMean2Estimate Command"

Latest revision as of 17:15, 7 October 2017

TMean2Estimate( <List of Sample Data 1>, <List of Sample Data 2>, <Level>, <Boolean Pooled> ): Calculates a t confidence interval estimate of the difference between two population means using the given sample data sets and confidence Level.; If Pooled = true, then population variances are assumed equal and sample standard deviations are combined in calculation.; If Pooled = false, then population variances are not assumed equal and sample standard deviations are not combined.; Results are returned in list form as {lower confidence limit, upper confidence limit}.

TMean2Estimate( <Sample Mean 1>, <Sample Standard Deviation 1>, <Sample Size 1>, <Sample Mean 2>, <Sample Standard Deviation 2>, <Sample Size 2>, <Level>, <Boolean Pooled> ): Calculates a t confidence interval estimate of the difference between two population means using the given sample statistics and confidence Level. Pooled is defined as above. Results are returned in list form as {lower confidence limit, upper confidence limit}.

@@ Line 1: / Line 1: @@
+<noinclude>{{Manual Page|version=5.0}}</noinclude>{{command|statistics}}
-<noinclude>{{Manual Page|version=4.0}}</noinclude>
+;TMean2Estimate( &lt;List of Sample Data 1>, &lt;List of Sample Data 2>, <Level>, <Boolean Pooled> )
-{{command|statistics}}
+: Calculates a t confidence interval estimate of the difference between two population means using the given sample data sets and confidence ''Level''.
-;TTest2[<List of Sample Data 1>,<List of Sample Data 2>,<Level>,<Boolean Pooled>]
-: Calculates a T confidence interval estimate of the difference between two population means using the given sample data sets and confidence ''Level''.
 : If ''Pooled'' = true, then population variances are assumed equal and sample standard deviations are combined in calculation.
 : If ''Pooled'' = false, then population variances are not assumed equal and sample standard deviations are not combined.
-:Results are returned in list form as {lower confidence limit,  upper confidence limit}.
+:Results are returned in list form as ''{lower confidence limit,  upper confidence limit}''.
-;TMean2Estimate[<Sample Mean 1 >,<Sample Standard Deviation 1 >, <Sample Size 1>, <Sample Mean 2 >,<Sample Standard Deviation 2 >, <Sample Size 2>, <Level>,<Boolean Pooled>]
+;TMean2Estimate( <Sample Mean 1>, <Sample Standard Deviation 1>, <Sample Size 1>, <Sample Mean 2>, <Sample Standard Deviation 2>, <Sample Size 2>, <Level>, <Boolean Pooled> )
-: Calculates a T confidence interval estimate of the difference between two population means using the given sample statistics and confidence ''Level''. Results are returned in list form as {lower confidence limit,  upper confidence limit}.
+: Calculates a t confidence interval estimate of the difference between two population means using the given sample statistics and confidence ''Level''. ''Pooled'' is defined as above. Results are returned in list form as ''{lower confidence limit,  upper confidence limit}''.
-:''Pooled'' is defined as above.
-{{Note| 1= This interval has definition:   '''''(sample mean1 - sample mean2) ± t* SE''''', where
-:: n1, n2 = sample sizes
-:: s1, s2 = sample standard deviations
-:: If pooled = true
-::: sp = [http://en.wikipedia.org/wiki/Pooled_variance pooled standard deviation]
-::: SE = sp * sqrt(1/n1 + 1/n2)
-::: t* =  critical value for given confidence ''Level'' and T distribution with degrees of freedom = n1 + n2 - 2.
-:: If pooled = false
-::: SE = sqrt(s1^2/n1 + s2^2/n2)
-::: t* =  critical value for given confidence ''Level'' and T distribution with degrees of freedom given by the    [http://en.wikipedia.org/wiki/Welch%27s_t_test Welch-Satterthwaite approximation] .
-}}

Difference between revisions of "TMean2Estimate Command"

Latest revision as of 17:15, 7 October 2017

TMean2Estimate

Command Categories (All commands)