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*The author of this computation has been verified*
R Software Module: /rwasp_twosampletests_mean.wasp (opens new window with default values)
Title produced by software: Paired and Unpaired Two Samples Tests about the Mean
Date of computation: Sun, 30 Oct 2011 08:40:09 -0400

Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL http://www.freestatistics.org/blog/date/2011/Oct/30/t1319978419d0wrx6dhggg4y6e.htm/, Retrieved Wed, 22 May 2013 18:28:36 +0000

Original text written by user:

IsPrivate?
No (this computation is public)

User-defined keywords:

System-generated keywords (parent):
(pk = 0)
Estimated Impact
17

Dataseries X:
» Textfile « » CSV « » Correlation Matrix « » Notched Boxplots «

Output produced by software:

Enter (or paste) a matrix (table) containing all data (time) series. Every column represents a different variable and must be delimited by a space or Tab. Every row represents a period in time (or category) and must be delimited by hard returns. The easiest way to enter data is to copy and paste a block of spreadsheet cells. Please, do not use commas or spaces to seperate groups of digits!

 Summary of computational transaction Raw Input view raw input (R code) Raw Output view raw output of R engine Computing time 2 seconds R Server 'Herman Ole Andreas Wold' @ wold.wessa.net

 Two Sample t-test (paired) Difference: Mean1 - Mean2 -0.0333333333333333 t-stat -0.238693233513124 df 29 p-value 0.813022196516673 H0 value 0 Alternative two.sided CI Level 0.95 CI [-0.318948138583667,0.252281471917001] F-test to compare two variances F-stat 1.02811144477811 df 36 p-value 0.948017979957299 H0 value 1 Alternative two.sided CI Level 0.95 CI [0.501634592262639,2.05118823894321]

 Welch Two Sample t-test (paired) Difference: Mean1 - Mean2 -0.0333333333333333 t-stat -0.238693233513124 df 29 p-value 0.813022196516673 H0 value 0 Alternative two.sided CI Level 0.95 CI [-0.318948138583667,0.252281471917001]

 Wicoxon rank sum test with continuity correction (paired) W 72 p-value 0.829309516759259 H0 value 0 Alternative two.sided Kolmogorov-Smirnov Test to compare Distributions of two Samples KS Statistic 0.0594594594594595 p-value 0.99999999262585 Kolmogorov-Smirnov Test to compare Distributional Shape of two Samples KS Statistic 0.54054054054054 p-value 0.000124877670779733

Charts produced by software:
 http://www.freestatistics.org/blog/date/2011/Oct/30/t1319978419d0wrx6dhggg4y6e/12zgi1319978407.png (opens in new window) http://www.freestatistics.org/blog/date/2011/Oct/30/t1319978419d0wrx6dhggg4y6e/12zgi1319978407.ps (opens in new window) Click here to open pdf file.

 http://www.freestatistics.org/blog/date/2011/Oct/30/t1319978419d0wrx6dhggg4y6e/2er7g1319978407.png (opens in new window) http://www.freestatistics.org/blog/date/2011/Oct/30/t1319978419d0wrx6dhggg4y6e/2er7g1319978407.ps (opens in new window) Click here to open pdf file.

 http://www.freestatistics.org/blog/date/2011/Oct/30/t1319978419d0wrx6dhggg4y6e/30oz91319978407.png (opens in new window) http://www.freestatistics.org/blog/date/2011/Oct/30/t1319978419d0wrx6dhggg4y6e/30oz91319978407.ps (opens in new window) Click here to open pdf file.

Parameters (Session):
par1 = 1 ; par2 = 2 ; par3 = 0.95 ; par4 = two.sided ; par5 = paired ; par6 = 0.0 ;

Parameters (R input):
par1 = 1 ; par2 = 2 ; par3 = 0.95 ; par4 = two.sided ; par5 = paired ; par6 = 0.0 ;

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