# chi2test 1.0

OS : Windows / Linux / Mac OS / BSD / Solaris
Script Licensing : Freeware
Created : Sep 14, 2007
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## Usage: [p, Q]= chi2test(x) <br />The chi-squared ...

Usage: [p, Q]= chi2test by Peder Axensten(x)
The chi-squared test.
Given a number of samples this function tests the hypothesis that the samples are
independent. If Q > chi2(p, nu), the hypothesis is rejected.
Each column represents a variables, each row a sample.
If you find any errors, please let me know: .
ARGUMENTS:
x Absolut numbers.
p The prob ability value, calculated from Q.
Q The resulting Q-value.
EXAMPLE 1
In region A, 324 of 556 cows were red, whereas in region B 98 of 260 were red.
[p, Q]= chi2test 1.0([324, 556-324; 98, 260-98])
p= 4. 2073e-08
Q= 30. 0515
With an error risk of about 4e-08, we can claim that the samples are independent.
EXAMPLE 2
Throw two different dices to see if they have the same probability of 1 (and 2, 3, 4, 5, 6).
We don't check if they are symetrical, only if the both behave in the same way.
[p, Q] = chi2test [chi2test1.0.exe]([15, 10; 7, 11; 9, 7; 20, 15; 26, 21; 19, 16])
p= 0. 8200
Q = 2. 2059
The dices don't significantly behave differently. That is, they seem to behave in the same way.
Demands:
matlab Release: R2007a

chi2test 1.0 scripting tags: chitest, independent, chi2test, matlab, chi2test statistics, behave, matlab chi2test, statistics probability, region, samples. What is new in chi2test 1.0 software script? - Unable to find chi2test 1.0 news. What is improvements are expecting? Newly-made chi2test 1.1 will be downloaded from here. You may download directly. Please write the reviews of the chi2test. License limitations are unspecified.