Doubt regarding Normality Testing
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- This topic has 5 replies, 2 voices, and was last updated 16 years, 1 month ago by
sai.
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July 17, 2006 at 4:06 am #44035
Could someone help me to clear my query. For normality testing, what hypothesis we should set for null and alternative?
Regards,
Sai
0July 17, 2006 at 8:22 am #140457
indreshParticipant@indreshInclude @indresh in your post and this person will
be notified via email.Always remember this
When P is high Null Should Fly
In normality test Null Hypothesis is that the data is normal
High p value we accept Null hypothesis
rgds0July 17, 2006 at 8:35 am #140458Dear Indresh,
But null is what we are stuck with and alternative is what we want to prove it. Generally we would like our data to be normal to perform many tools, then how come null will be data is normal.
Regards,
Sai0July 17, 2006 at 8:59 am #140459
indreshParticipant@indreshInclude @indresh in your post and this person will
be notified via email.Yes we would like to proceed with normal data and null hypothesis shall be that the data is normal
So whats the issue, did’nt quite get what you mean by your statement
0July 17, 2006 at 9:05 am #140461
indreshParticipant@indreshInclude @indresh in your post and this person will
be notified via email.A null hypothesis (H0) is a stated assumption that there is no difference in parameters (mean, variance, DPMO) for two or more populations.
Classic definition from this site itself
i hope this makes things clear
in cases where we wanna find out if there exist an relation between y and x , null would be no there does not hence less the p value we take that relationship exists. similarily if we are to find out is there any difference between these two populations etc null is that there is no difference and higher the p value higher the probability that there actually exist no relation or chances of there existing a relation is less.
hope this helps
rgds
0July 17, 2006 at 9:24 am #140463So if i am checking for normality through Minitab and if i get p-value of 0.567, it shows that your are accepting your data to be normal with such a greater risk. Am i right in this decision?
Regrads
Sai0 -
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