# Tagged Questions

40 views

### Testing to see if a population is normal?

I'm an amateur statistician. I do it mostly for fun. I'm finishing up on my first semester stats class that covers up to hypothesis testing. I'm planning on beginning learning simple regression ...
89 views

### Diagnosis of normality assumption and fitting linear regression in R

I am using the data veteran from R package survival. How can I diagnose the normality ...
454 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?
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### 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?
332 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 ...
287 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 ...
773 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 ...
4k 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. ...
1k 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, ...
13k 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 ...