# chi2test 1.0

OS : Windows / Linux / Mac OS / BSD / Solaris

Script Licensing : Freeware

Created : Sep 14, 2007

Downloads : 12

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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.

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.

**• matlab Release: R2007a**

**Demands:****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.