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Author

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R Software Module

rwasp_hypothesisvariance2.wasp

Title produced by software

Testing Variance - p-value (probability)

Date of computation

Fri, 12 Nov 2010 07:55:41 +0000

Cite this page as follows

Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?v=date/2010/Nov/12/t1289548442zcwy10bftpwqc16.htm/, Retrieved Mon, 29 Apr 2024 05:16:03 +0000

Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=93993, Retrieved Mon, 29 Apr 2024 05:16:03 +0000

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No (this computation is public)

User-defined keywords

Estimated Impact

161

Family? (F = Feedback message, R = changed R code, M = changed R Module, P = changed Parameters, D = changed Data)

F     [Testing Variance - p-value (probability)] [Question 8 male] [2010-11-11 10:09:07] [19b0644bed4ce533b9dd7e8852a929a7]
F         [Testing Variance - p-value (probability)] [] [2010-11-12 07:55:41] [d1991ab4912b5ede0ff54c26afa5d84c] [Current]

Feedback Forum

2010-11-13 11:00:59 [Hans Tierens] [reply] 
In de vraag staat dat je 2 tests zou moeten uitvoeren. Jij geeft hier 1 test weer. 
 
Het is echter zo dat omdat de variantie van de steekproef voor mannen exact gelijk is aan de veronderstelde populatievariantie. Het is dus overbodig om deze nog te berekenen. Het is zeker dat de nulhypothese aanvaard wordt. 
 
Voor vrouwen is de critical-value gelijk aan 13,775. Dit wil ook zeggen dat de waarde significant groter is dan de veronderstelde 13 (op basis van eenzijdige testen). We concluderen dat de waarde niet significant verschilt van 13, maar wel significant groter is dan 13.

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Summary of computational transaction
Raw Input	view raw input (R code)
Raw Output	view raw output of R engine
Computing time	1 seconds
R Server	'RServer@AstonUniversity' @ vre.aston.ac.uk

\begin{tabular}{lllllllll}
\hline
Summary of computational transaction \tabularnewline
Raw Input & view raw input (R code)  \tabularnewline
Raw Output & view raw output of R engine  \tabularnewline
Computing time & 1 seconds \tabularnewline
R Server & 'RServer@AstonUniversity' @ vre.aston.ac.uk \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=93993&T=0

[TABLE]
[ROW][C]Summary of computational transaction[/C][/ROW]
[ROW][C]Raw Input[/C][C]view raw input (R code) [/C][/ROW]
[ROW][C]Raw Output[/C][C]view raw output of R engine [/C][/ROW]
[ROW][C]Computing time[/C][C]1 seconds[/C][/ROW]
[ROW][C]R Server[/C][C]'RServer@AstonUniversity' @ vre.aston.ac.uk[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=93993&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=93993&T=0

As an alternative you can also use a QR Code:

The GUIDs for individual cells are displayed in the table below:

Summary of computational transaction
Raw Input	view raw input (R code)
Raw Output	view raw output of R engine
Computing time	1 seconds
R Server	'RServer@AstonUniversity' @ vre.aston.ac.uk

Testing Variance - p-value (probability)
Sample size	98
Sample variance	13
Null hypothesis (H0)	13
Type I error (alpha)	0.35
p-value (probability)	0.519097010628639
Conclusion	There is no reason to reject the null hypothesis

\begin{tabular}{lllllllll}
\hline
Testing Variance - p-value (probability) \tabularnewline
Sample size & 98 \tabularnewline
Sample variance & 13 \tabularnewline
Null hypothesis (H0) & 13 \tabularnewline
Type I error (alpha) & 0.35 \tabularnewline
p-value (probability) & 0.519097010628639 \tabularnewline
Conclusion & There is no reason to reject the null hypothesis \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=93993&T=1

[TABLE]
[ROW][C]Testing Variance - p-value (probability)[/C][/ROW]
[ROW][C]Sample size[/C][C]98[/C][/ROW]
[ROW][C]Sample variance[/C][C]13[/C][/ROW]
[ROW][C]Null hypothesis (H0)[/C][C]13[/C][/ROW]
[ROW][C]Type I error (alpha)[/C][C]0.35[/C][/ROW]
[ROW][C]p-value (probability)[/C][C]0.519097010628639[/C][/ROW]
[ROW][C]Conclusion[/C][C]There is no reason to reject the null hypothesis[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=93993&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=93993&T=1

As an alternative you can also use a QR Code:

The GUIDs for individual cells are displayed in the table below:

Testing Variance - p-value (probability)
Sample size	98
Sample variance	13
Null hypothesis (H0)	13
Type I error (alpha)	0.35
p-value (probability)	0.519097010628639
Conclusion	There is no reason to reject the null hypothesis

Parameters (Session):

par1 = 98 ; par2 = 13 ; par3 = 13 ; par4 = 0.35 ;

Parameters (R input):

par1 = 98 ; par2 = 13 ; par3 = 13 ; par4 = 0.35 ;

R code (references can be found in the software module):

par1<-as.numeric(par1)
par2<-as.numeric(par2)
par3<-as.numeric(par3)
par4<-as.numeric(par4)
df <- par1 - 1
myc <- df * par2 / par3
myc
if (par2 > par3)
{
myp <- 1 - pchisq(myc,df)
} else {
myp <- pchisq(myc,df)
}
myp
load(file='createtable')
a<-table.start()
a<-table.row.start(a)
a<-table.element(a,hyperlink('ht_variance.htm','Testing Variance - p-value (probability)','learn more about Statistical Hypothesis Testing about the Variance'),2,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Sample size',header=TRUE)
a<-table.element(a,par1)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Sample variance',header=TRUE)
a<-table.element(a,par2)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Null hypothesis (H0)',header=TRUE)
a<-table.element(a,par3)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Type I error (alpha)',header=TRUE)
a<-table.element(a,par4)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'p-value (probability)',header=TRUE)
a<-table.element(a,myp)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Conclusion',header=TRUE)
if (myp > par4) a<-table.element(a,'There is no reason to reject the null hypothesis') else a<-table.element(a,'Reject the null hypothesis')
a<-table.row.end(a)
a<-table.end(a)
table.save(a,file='mytable.tab')

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