Tagged Questions
3
votes
0answers
252 views
Is the Anderson-Darling test or Shapiro-Wilk test more powerful? [closed]
In the testing of normality, how would the 2 compare? Is one significantly better than the other?
4
votes
1answer
301 views
What kinds of variables should we use the normality test for?
When should we apply normality tests? For which types of the variables should we apply the normality test?
For example dependent variables, independent variables, or control variables, etc?
5
votes
3answers
239 views
Is there any test for a null hypothesis of non-normality?
I'm currently looking for a test having for null hypothesis that the sample does not come from observing a normally distributed random variable. In other words, I'd like to know if there's a test ...
5
votes
4answers
242 views
How to verify that simulated data is normally distributed?
I have a program generating purportedly normal distributions and I would like to test it. I have a number of issues; perhaps the experts here will help me sort out the essential from the inessential ...
3
votes
2answers
496 views
What have to be normally distributed: groups or whole sample?
It is a general and maybe stupid question, but it will help me to avoid a mistake. To test the dependence of continuous variable on nominal with parametric test (t-test, ANOVA), "the data has to be ...
13
votes
2answers
3k views
Is it meaningful to test for normality with a very small sample size (e.g., n = 6)?
I have a sample size of 6.
In such a case, does it make sense to test for normality using the Kolmogorov-Smirnov test? I used SPSS.
I have a very small sample size because it takes time to get each.
...
2
votes
4answers
881 views
Justifying normal approximation of experimental data
Background:
In connection with the question here I came upon a more interesting question. I believe the question is large and distinct enough to have it's own thread. Of course I might be mistaken, ...
41
votes
8answers
9k views
Is normality testing 'essentially useless'?
A former colleague once argued to me as follows: "we usually apply normality tests to the results of processes that, under the null, generate random variables that are only asymptotically or nearly ...
1
vote
1answer
517 views
Wald-Wolfowitz Runs Test for Normality Assumptions Testing
Some guys told me that it's appropriate to use Wald-Wolfowitz Runs Test as a normality test (like Shapiro-Wilk's or Kolmogorov-Smirnov...). Do you think this is good way to test normality assumptions?
...
9
votes
5answers
4k views
Appropriate normality tests for small samples
Title says enough... so far, I've been using Shapiro-Wilk's statistic in order to test normality assumptions in small samples. Could you, please, recommend another technique?
