test-t
Student's t test for unpaired or paired samples.
This file is applicable for equal or unequal sample sizes; for paired or
unpaired samples. When the test is unpaired, the Fisher-Snedecor F-test is
performed to assess the equality of variance. If variances are not equal,
Satterthwaite's approximate t test is performed.
Syntax: TESTT(X1,X2,TST,ALPHA,TAIL)
Inputs:
X1 and X2 - data vectors (mandatory).
TST - unpaired (0) or paired (1) test (default = 0).
ALPHA - significance level (default = 0.05).
TAIL - 1-tailed test (1) or 2-tailed test (2). (default = 1).
Outputs:
- t value.
- degrees of freedom.
- Confidence interval of means difference (for paired test)
- p-value
- Power
Example:
X1=[77 79 79 80 80 81 81 81 81 82 82 82 82 83 83 84 84 84 84 85 ...
85 86 86 87 87];
X2=[82 82 83 84 84 85 85 86 86 86 86 86 86 86 86 86 87 87 87 88 ...
88 88 89 90 90];
Calling on Matlab the function: testt
Answer is:
FISHER-SNEDECOR F-TEST FOR EQUALITY OF VARIANCES
F DF_numerator DF_denominator p_value
______ ____________ ______________ _______
1.5379 24 24 0.29861
--------------------------------------------------------------------------------
Variances are equal
--------------------------------------------------------------------------------
STUDENT'S T-TEST FOR UNPAIRED SAMPLES
t DF tail p_value Power
______ __ ____ _________ _______
5.2411 48 1 1.765e-06 0.99958
STATS=TESTT(...) returns a structure with all test(s) statistics
Created by Giuseppe Cardillo
giuseppe.cardillo-edta@poste.it
To cite this file, this would be an appropriate format:
Cardillo G. (2006). Student t-Test for unpaired or paired samples.
http://www.mathworks.com/matlabcentral/fileexchange/12699
인용 양식
Giuseppe Cardillo (2024). test-t (https://github.com/dnafinder/testt), GitHub. 검색됨 .
MATLAB 릴리스 호환 정보
플랫폼 호환성
Windows macOS Linux카테고리
태그
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!GitHub 디폴트 브랜치를 사용하는 버전은 다운로드할 수 없음
버전 | 게시됨 | 릴리스 정보 | |
---|---|---|---|
2.0.0.0 | help correction
|
|
|
1.6.0.0 | To compute power, Testt requires powerStudent by Trujillo-Ortiz, A. and R. Hernandez-Walls. If this function is not present on the computer, Sandler try to download it from FEX |
||
1.5.0.0 | Changes in description |
||
1.4.0.0 | STATS structure creation |
||
1.3.0.0 | Mistake correction in error handling routines |
||
1.2.0.0 | Fisher-Snedecor F-test check added; Satterthwaite's approximation added; changes in output format |
||
1.1.0.0 | Change in Help section |
||
1.0.0.0 | Improvement in input error handling |