https://community.jmp.com/t5/Discussions/When-to-use-parametric-tests-if-the-data-is-not-normally/m-p/822206#M100168 <P>There is no assumption by these procedures that the response is normally distributed. The distribution of the residuals is assumed to be normal with a constant mean and variance. The conditional equation applies to the mean, variance, or both.</P> Thu, 12 Dec 2024 14:59:08 GMT Mark_Bailey 2024-12-12T14:59:08Z https://community.jmp.com/t5/Discussions/When-to-use-parametric-tests-if-the-data-is-not-normally/m-p/822105#M100149 <P>Hello</P><P>&nbsp;</P><P>&nbsp;.If I am investigating a dependent variable that is not normally distributed (Shapiro Wilk p &lt;0.05)</P><P>Can I still use parametric tests like linear regression and t-tests knowing that the calculated sample size is 380 and the collected data 1400 (large sample size)</P> Thu, 12 Dec 2024 06:31:20 GMT https://community.jmp.com/t5/Discussions/When-to-use-parametric-tests-if-the-data-is-not-normally/m-p/822105#M100149 Samira 2024-12-12T06:31:20Z https://community.jmp.com/t5/Discussions/When-to-use-parametric-tests-if-the-data-is-not-normally/m-p/822206#M100168 <P>There is no assumption by these procedures that the response is normally distributed. The distribution of the residuals is assumed to be normal with a constant mean and variance. The conditional equation applies to the mean, variance, or both.</P> Thu, 12 Dec 2024 14:59:08 GMT https://community.jmp.com/t5/Discussions/When-to-use-parametric-tests-if-the-data-is-not-normally/m-p/822206#M100168 Mark_Bailey 2024-12-12T14:59:08Z