# Answer to Question #5064 in MatLAB | Mathematica | MathCAD | Maple for stat

Question #5064
How can I write a Matlab function &ldquo;chi2test&rdquo;, which will be used to carry out the hypothesis testing for population variance. The prototype of the function is [h, chi2value, df] = chi2test(sample, var0, alpha, tail) where h = Conclusion of the test. The value 0 indicates rejection the null hypothesis. Otherwise, return the value 1. chi2value = The value of test statistic. df = The degrees of freedom of the 2 distribution if the H0 is true. sample = The sample data for the test. var0 = The assumed population variance in the H0. alpha = The level of signiﬁcance of the test. tail = The value 0 indicates a two-tailed test. The value 1 indicates a lower-tailed test. The value +1 indicates a upper-tailed test. Otherwise, print &ldquo;error&rdquo;.
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