Is it possible to get a p value of 0

That means that your data doesn't seem to be normal. Maybe you forgot this: Matlab does NOT return the p-value for a test! The standard output of testing in Matlab is a output! If you are interested in your p-value, just do this:. H is the variable and the standard output if you don't name any variables and P is your p-value. In general, smaller p-values are desirable. The smaller the p-value, the more certainty there is that the null hypothesis can be rejected.

For example, in the case of the function KSTEST a very small p-value would indicate with a great deal of significance that the data distribution you are testing does not follow a standard normal distribution i. If you are always getting exactly zero, and not just really small values that are being rounded off when displayed, you may want to check for the possibility that the statistical functions are failing and returning garbage results.

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Collectives on Stack Overflow. Learn more. Why p-value is 0 when testing the distribution Ask Question. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. Featured on Meta.

Now live: A fully responsive profile. Linked 3. Related Hot Network Questions. Question feed. Cross Validated works best with JavaScript enabled. Skip to content Menu. Posted on November 27, April 24, by Zach. Example: Getting a P-Value of 0.

What a P-Value of 0. Conclusion If you conduct a statistical test using a significance level of 0. Translate your research into a publication-worthy manuscript by understanding the nuances of academic writing. Subscribe and get curated reads that will help you write an excellent manuscript.

Confirm that you would also like to sign up for free personalized email coaching for this stage. Answer Follow this Question. Answer: Your question is valid. So, a few points for your consideration are: Was the sample incompatible with the null hypothesis? Was the p-value rounded off to zero in case it had many zeros before the value?