How are critical values derived for the Kolmogorov-Smirnov Test?












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One appealing feature of the K-S test is that it is distribution-free. So this leads to my question - how are the critical values for the K-S derived, then? Is there a way to express the critical values as an integral, like for percentiles of the standard normal distribution?



Sources that have such information would be very helpful (i.e., a textbook).



See, for example, the table below (from http://people.cs.pitt.edu/~lipschultz/cs1538/prob-table_KS.pdf).



enter image description here










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  • $begingroup$
    Your link is dead.
    $endgroup$
    – Astrid
    Jan 6 at 23:18










  • $begingroup$
    Here it is: people.cs.pitt.edu/~lipschultz/cs1538/prob-table_KS.pdf
    $endgroup$
    – Astrid
    Jan 6 at 23:30
















4












$begingroup$


One appealing feature of the K-S test is that it is distribution-free. So this leads to my question - how are the critical values for the K-S derived, then? Is there a way to express the critical values as an integral, like for percentiles of the standard normal distribution?



Sources that have such information would be very helpful (i.e., a textbook).



See, for example, the table below (from http://people.cs.pitt.edu/~lipschultz/cs1538/prob-table_KS.pdf).



enter image description here










share|cite|improve this question











$endgroup$












  • $begingroup$
    Your link is dead.
    $endgroup$
    – Astrid
    Jan 6 at 23:18










  • $begingroup$
    Here it is: people.cs.pitt.edu/~lipschultz/cs1538/prob-table_KS.pdf
    $endgroup$
    – Astrid
    Jan 6 at 23:30














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$begingroup$


One appealing feature of the K-S test is that it is distribution-free. So this leads to my question - how are the critical values for the K-S derived, then? Is there a way to express the critical values as an integral, like for percentiles of the standard normal distribution?



Sources that have such information would be very helpful (i.e., a textbook).



See, for example, the table below (from http://people.cs.pitt.edu/~lipschultz/cs1538/prob-table_KS.pdf).



enter image description here










share|cite|improve this question











$endgroup$




One appealing feature of the K-S test is that it is distribution-free. So this leads to my question - how are the critical values for the K-S derived, then? Is there a way to express the critical values as an integral, like for percentiles of the standard normal distribution?



Sources that have such information would be very helpful (i.e., a textbook).



See, for example, the table below (from http://people.cs.pitt.edu/~lipschultz/cs1538/prob-table_KS.pdf).



enter image description here







statistics






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edited Jan 7 at 13:19







Clarinetist

















asked Sep 22 '14 at 2:38









ClarinetistClarinetist

10.9k42778




10.9k42778












  • $begingroup$
    Your link is dead.
    $endgroup$
    – Astrid
    Jan 6 at 23:18










  • $begingroup$
    Here it is: people.cs.pitt.edu/~lipschultz/cs1538/prob-table_KS.pdf
    $endgroup$
    – Astrid
    Jan 6 at 23:30


















  • $begingroup$
    Your link is dead.
    $endgroup$
    – Astrid
    Jan 6 at 23:18










  • $begingroup$
    Here it is: people.cs.pitt.edu/~lipschultz/cs1538/prob-table_KS.pdf
    $endgroup$
    – Astrid
    Jan 6 at 23:30
















$begingroup$
Your link is dead.
$endgroup$
– Astrid
Jan 6 at 23:18




$begingroup$
Your link is dead.
$endgroup$
– Astrid
Jan 6 at 23:18












$begingroup$
Here it is: people.cs.pitt.edu/~lipschultz/cs1538/prob-table_KS.pdf
$endgroup$
– Astrid
Jan 6 at 23:30




$begingroup$
Here it is: people.cs.pitt.edu/~lipschultz/cs1538/prob-table_KS.pdf
$endgroup$
– Astrid
Jan 6 at 23:30










1 Answer
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If you are testing fit to a specific distribution, then note that for a sample of data $X$ and hypothesized distribution $F, F^{-1}(X) sim U(0,1)$. Therefore, you need to derive the distribution of the largest vertical difference between your transformed sample and the hypothesized CDF, which will be taken to be the standard uniform. The distribution of this is not mathematically nice. Here is a paper that walks you though why...and why we just use numerical methods.






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    1 Answer
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    $begingroup$

    If you are testing fit to a specific distribution, then note that for a sample of data $X$ and hypothesized distribution $F, F^{-1}(X) sim U(0,1)$. Therefore, you need to derive the distribution of the largest vertical difference between your transformed sample and the hypothesized CDF, which will be taken to be the standard uniform. The distribution of this is not mathematically nice. Here is a paper that walks you though why...and why we just use numerical methods.






    share|cite|improve this answer









    $endgroup$


















      2












      $begingroup$

      If you are testing fit to a specific distribution, then note that for a sample of data $X$ and hypothesized distribution $F, F^{-1}(X) sim U(0,1)$. Therefore, you need to derive the distribution of the largest vertical difference between your transformed sample and the hypothesized CDF, which will be taken to be the standard uniform. The distribution of this is not mathematically nice. Here is a paper that walks you though why...and why we just use numerical methods.






      share|cite|improve this answer









      $endgroup$
















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        2








        2





        $begingroup$

        If you are testing fit to a specific distribution, then note that for a sample of data $X$ and hypothesized distribution $F, F^{-1}(X) sim U(0,1)$. Therefore, you need to derive the distribution of the largest vertical difference between your transformed sample and the hypothesized CDF, which will be taken to be the standard uniform. The distribution of this is not mathematically nice. Here is a paper that walks you though why...and why we just use numerical methods.






        share|cite|improve this answer









        $endgroup$



        If you are testing fit to a specific distribution, then note that for a sample of data $X$ and hypothesized distribution $F, F^{-1}(X) sim U(0,1)$. Therefore, you need to derive the distribution of the largest vertical difference between your transformed sample and the hypothesized CDF, which will be taken to be the standard uniform. The distribution of this is not mathematically nice. Here is a paper that walks you though why...and why we just use numerical methods.







        share|cite|improve this answer












        share|cite|improve this answer



        share|cite|improve this answer










        answered Sep 22 '14 at 18:50







        user76844





































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