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if my data followed to a special distribution, how can i calculate the critical value of k-s test in this case?

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Q: How critical value is calculated in Kolmogorov-Smirnov test?
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What is the calculated numerical value that is compared to a table value in a hypothesis test called?

It is the test statistic.


What is the difference between a test statistic and a critical value?

A test statistic is a value calculated from a set of observations. A critical value depends on a null hypothesis about the distribution of the variable and the degree of certainty required from the test. Given a null hypothesis it may be possible to calculate the distribution of the test statistic. Then, given an alternative hypothesis, it is may be possible to calculate the probability of the test statistic taking the observed (or more extreme) value under the null hypothesis and the alternative. Finally, you need the degree of certainty required from the test and this will determine the value such that if the test statistic is more extreme than the critical value, it is unlikely that the observations are consistent with the hypothesis so it must be rejected in favour of the alternative hypothesis. It may not always be possible to calculate the distribution function for the variable.


What is z critical value for lower tailed test for 5 percent?

1.64


What is the critical z value of a two-tailed test with alpha 0.005?

-2.58,2.58


How is the critical region utilized in hypothesis testing?

When you formulate and test a statistical hypothesis, you compute a test statistic (a numerical value using a formula depending on the test). If the test statistic falls in the critical region, it leads us to reject our hypothesis. If it does not fall in the critical region, we do not reject our hypothesis. The critical region is a numerical interval.