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Description of Statistical Computation

Author's title

Author*The author of this computation has been verified*
R Software Moduletest_mean.wasp
Title produced by softwarePopulation Mean Test
Date of computationTue, 26 Oct 2010 15:12:35 +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/t1288105867duufou9ti9kwnuy.htm/, Retrieved Sun, 07 Dec 2025 14:36:30 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=89260, Retrieved Sun, 07 Dec 2025 14:36:30 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact399

Tree of Dependent Computations

Family? (F = Feedback message, R = changed R code, M = changed R Module, P = changed Parameters, D = changed Data)
-     [Population Mean Test] [Treatment 'T'] [2010-10-22 13:01:22] [6bc4f9343b7ea3ef5a59412d1f72bb2b]
F    D    [Population Mean Test] [Hypothese voorbee...] [2010-10-26 15:12:35] [e26438ba7029caa0090c95690001dbf5] [Current]
Feedback Forum
2010-11-02 14:46:46 [1951de723fd2749e12bc2f1a75bd3e74] [reply] 
Je hebt de verkeerde data gebruikt voor je berekening daardoor is je conclusie fout. Je moest de data uit de laatste kolom Tot-Pre gebruiken.


We gaan de hypotheses testen door een t-verdeling te nemen.
Voor treatment T zien we volgende gegevens:
Sample size: 35
Sample SD : 0,5
Confidence : 0,95 (omdat we 5% type 1 error hebben)
Null hypothesis : 0
Als nul buiten betrouwbaarheidsinterval [ 0.34 , 0.68 ] (Het is een tweezijdige toets dus we kijken naar beide kanten van het interval) ligt dan moeten we Null hypothese verwerpen. 51 % (sample mean) van de leerlingen leert iets dankzij treatment T. We verwerpen de hypothese.

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Dataset

Dataseries X:
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Histogram
Boxplots 
1,25
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0
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0,25
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1,5
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0,5
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Tables (Output of Computation)





Population Mean Test - Ungrouped Data
StatisticValue
H0: mean =
H1: mean <>
Arithmetic Mean0.7424242
Standard Error0.110678
T-STAT6.70797
p-value0
Observations33

\begin{tabular}{lllllllll}
\hline

Population Mean Test - Ungrouped Data \tabularnewline

Statistic
Value \tabularnewline H0: mean = \tabularnewline H1: mean <> \tabularnewline Arithmetic Mean0.7424242 \tabularnewline Standard Error0.110678 \tabularnewline T-STAT6.70797 \tabularnewline p-value0 \tabularnewline Observations33 \tabularnewline \hline \end{tabular} %Source: https://freestatistics.org/blog/index.php?pk=89260&T=0

[TABLE]

[ROW][C]Population Mean Test - Ungrouped Data[/C][/ROW]

[ROW][C]Statistic[/C]
Value[/C][/ROW] [ROW][C]H0: mean =[/C][/C][/ROW] [ROW][C]H1: mean <>[/C][/C][/ROW] [ROW][C]Arithmetic Mean[/C]0.7424242[/C][/ROW] [ROW][C]Standard Error[/C]0.110678[/C][/ROW] [ROW][C]T-STAT[/C]6.70797[/C][/ROW] [ROW][C]p-value[/C]0[/C][/ROW] [ROW][C]Observations[/C]33[/C][/ROW] [/TABLE] Source: https://freestatistics.org/blog/index.php?pk=89260&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=89260&T=0

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

Population Mean Test - Ungrouped Data
StatisticValue
H0: mean =
H1: mean <>
Arithmetic Mean0.7424242
Standard Error0.110678
T-STAT6.70797
p-value0
Observations33


Figures (Output of Computation)

Input Parameters & R Code

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