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Description of Statistical Computation

Author's title

Author*The author of this computation has been verified*
R Software Modulerwasp_hypothesismeanu.wasp
Title produced by softwareTesting Mean with unknown Variance - Critical Value
Date of computationTue, 26 Oct 2010 15:36:52 +0000
Cite this page as followsStatistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?v=date/2010/Oct/26/t12881074168j9t4h9hu4w7c2i.htm/, Retrieved Sun, 28 Apr 2024 11:22:58 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=89296, Retrieved Sun, 28 Apr 2024 11:22:58 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact142

Tree of Dependent Computations

Family? (F = Feedback message, R = changed R code, M = changed R Module, P = changed Parameters, D = changed Data)
-     [Factor Analysis] [Sleep in Mammals ...] [2010-03-21 11:39:53] [b98453cac15ba1066b407e146608df68]
- RMPD  [Testing Mean with unknown Variance - Critical Value] [Hypothesis Test a...] [2010-10-19 11:45:26] [b98453cac15ba1066b407e146608df68]
F   PD      [Testing Mean with unknown Variance - Critical Value] [] [2010-10-26 15:36:52] [4dba6678eac10ee5c3460d144a14bd5c] [Current]
-    D        [Testing Mean with unknown Variance - Critical Value] [] [2010-10-26 15:46:24] [7f2363d2c77d3bf71367965cc53be730]
-               [Testing Mean with unknown Variance - Critical Value] [] [2010-10-26 16:01:05] [7f2363d2c77d3bf71367965cc53be730]
F    D            [Testing Mean with unknown Variance - Critical Value] [] [2010-10-26 16:15:34] [7f2363d2c77d3bf71367965cc53be730]
F                 [Testing Mean with unknown Variance - Critical Value] [] [2010-10-26 16:18:23] [7f2363d2c77d3bf71367965cc53be730]
- RM D            [Testing Mean with known Variance - Sample Size] [] [2010-10-26 16:24:34] [7f2363d2c77d3bf71367965cc53be730]
-                   [Testing Mean with known Variance - Sample Size] [] [2010-10-26 16:28:51] [7f2363d2c77d3bf71367965cc53be730]
-                   [Testing Mean with known Variance - Sample Size] [] [2010-10-26 16:33:07] [7f2363d2c77d3bf71367965cc53be730]
-                     [Testing Mean with known Variance - Sample Size] [] [2010-10-26 16:34:09] [7f2363d2c77d3bf71367965cc53be730]
F                       [Testing Mean with known Variance - Sample Size] [] [2010-10-26 16:38:31] [7f2363d2c77d3bf71367965cc53be730]
F RM                      [Minimum Sample Size - Testing Mean] [] [2010-10-26 16:47:49] [7f2363d2c77d3bf71367965cc53be730]
F                     [Testing Mean with known Variance - Sample Size] [] [2010-10-26 16:38:31] [7f2363d2c77d3bf71367965cc53be730]
Feedback Forum
2010-10-30 08:55:29 [7d66e2e510b144c68ca0882fd178e17c] [reply] 
Hier is iets fout gelopen in het overnemen van de data. Je hebt hier de verkeerde data ingegeven. Je had de data van de Excel file, sheet scales, kolom I moeten invoeren. Dan bekom je onderstaand resultaat:

http://www.freestatistics.org/blog/index.php?v=date/2010/Oct/23/t12878372006hzs2y5oh5a7q3c.htm/

Ik merk wel dat je de output correct interpreteert. Alleen bij de conclusie zeg je beter ‘niet significant verschillend van 20’ ipv ‘ongeveer 20’.

Post a new message

Dataset

Dataseries X:
Download CSV
Histogram
Boxplots 
16
20
15
19
19
16
17
28
25
20
16
23
21
23
18
20
9
25
20
21
22
27
18
16
22
20
20

Tables (Output of Computation)





Summary of computational transaction
Raw Inputview raw input (R code)
Raw Outputview raw output of R engine
Computing time0 seconds
R Server'George Udny Yule' @ 72.249.76.132

\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 & 0 seconds \tabularnewline
R Server & 'George Udny Yule' @ 72.249.76.132 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=89296&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]0 seconds[/C][/ROW]
[ROW][C]R Server[/C][C]'George Udny Yule' @ 72.249.76.132[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=89296&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=89296&T=0

As an alternative you can also use a QR Code:  
QR Code


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

Summary of computational transaction
Raw Inputview raw input (R code)
Raw Outputview raw output of R engine
Computing time0 seconds
R Server'George Udny Yule' @ 72.249.76.132






Hypothesis Test about the Mean - Confidence Interval
Sample size27
Sample standard deviation4.0163483577815
Confidence0.95
Null hypothesis20
Sample Mean19.8518518518519
2-sided Confidence Interval[ 18.2630373572677 , 21.440666346436 ]
Left-sided Confidence Interval[ 18.5335002767340 , +inf ]
Right-sided Confidence Interval[ -inf, 21.1702034269697 ]

\begin{tabular}{lllllllll}
\hline
Hypothesis Test about the Mean - Confidence Interval \tabularnewline
Sample size & 27 \tabularnewline
Sample standard deviation & 4.0163483577815 \tabularnewline
Confidence & 0.95 \tabularnewline
Null hypothesis & 20 \tabularnewline
Sample Mean & 19.8518518518519 \tabularnewline
2-sided Confidence Interval & [ 18.2630373572677 , 21.440666346436 ] \tabularnewline
Left-sided Confidence Interval & [ 18.5335002767340 , +inf ] \tabularnewline
Right-sided Confidence Interval & [ -inf,  21.1702034269697 ] \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=89296&T=1

[TABLE]
[ROW][C]Hypothesis Test about the Mean - Confidence Interval[/C][/ROW]
[ROW][C]Sample size[/C][C]27[/C][/ROW]
[ROW][C]Sample standard deviation[/C][C]4.0163483577815[/C][/ROW]
[ROW][C]Confidence[/C][C]0.95[/C][/ROW]
[ROW][C]Null hypothesis[/C][C]20[/C][/ROW]
[ROW][C]Sample Mean[/C][C]19.8518518518519[/C][/ROW]
[ROW][C]2-sided Confidence Interval[/C][C][ 18.2630373572677 , 21.440666346436 ][/C][/ROW]
[ROW][C]Left-sided Confidence Interval[/C][C][ 18.5335002767340 , +inf ][/C][/ROW]
[ROW][C]Right-sided Confidence Interval[/C][C][ -inf,  21.1702034269697 ][/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=89296&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=89296&T=1

As an alternative you can also use a QR Code:  
QR Code


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

Hypothesis Test about the Mean - Confidence Interval
Sample size27
Sample standard deviation4.0163483577815
Confidence0.95
Null hypothesis20
Sample Mean19.8518518518519
2-sided Confidence Interval[ 18.2630373572677 , 21.440666346436 ]
Left-sided Confidence Interval[ 18.5335002767340 , +inf ]
Right-sided Confidence Interval[ -inf, 21.1702034269697 ]


Figures (Output of Computation)

Input Parameters & R Code

Parameters (Session):
par1 = 0.95 ; par2 = 20 ;
Parameters (R input):
par1 = 0.95 ; par2 = 20 ;
R code (references can be found in the software module):
par1 <- as.numeric(par1)
par2 <- as.numeric(par2)
len <- length(x)
df <- len - 1
sd <- sd(x)
mx <- mean(x)
load(file='createtable')
delta2 <- abs(qt((1-par1)/2,df)) * sd / sqrt(len)
delta1 <- abs(qt((1-par1),df)) * sd / sqrt(len)
a<-table.start()
a<-table.row.start(a)
a<-table.element(a,'Hypothesis Test about the Mean - Confidence Interval',2,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Sample size',header=TRUE)
a<-table.element(a,len)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Sample standard deviation',header=TRUE)
a<-table.element(a,sd)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Confidence',header=TRUE)
a<-table.element(a,par1)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Null hypothesis',header=TRUE)
a<-table.element(a,par2)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Sample Mean',header=TRUE)
a<-table.element(a,mx)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'2-sided Confidence Interval',header=TRUE)
dum <- paste('[',mx-delta2)
dum <- paste(dum,',')
dum <- paste(dum,mx+delta2)
dum <- paste(dum,']')
a<-table.element(a,dum)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Left-sided Confidence Interval',header=TRUE)
dum <- paste('[',mx-delta1)
dum <- paste(dum,', +inf ]')
a<-table.element(a,dum)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Right-sided Confidence Interval',header=TRUE)
dum <- paste('[ -inf, ',mx+delta1)
dum <- paste(dum,']')
a<-table.element(a,dum)
a<-table.row.end(a)
a<-table.end(a)
table.save(a,file='mytable.tab')