Tagged Questions

1
vote
1answer
77 views

Can I justify performing a two-way anova where data is normally distributed but has heterogeneous variances?

I'm an undergraduate psychology student currently finishing up my dissertation, but a few days ago, while going through my SPSS output, I realized my Levene's test is significant, but my data is ...
-3
votes
1answer
165 views

On what basis do we differentiate a standard normal distribution from normal distribution?

The normal distribution is a prerequisite for ANOVA. It is not clear what we are supposed to understand by "standard normal distribution". Does ANOVA need a standard normal distribution? The answer ...
1
vote
0answers
107 views

What is the nonparametric variant of multivariate ANOVA with more than one one factor (and with interactions between factors)?

I analyze real data where assuptions of classical multiway (more than one factor assumed) MANOVA (more than one response variable) are not met (normality, equal variances). Is there any nonparametric ...
4
votes
2answers
2k views

How to test for normality in a 2x2 ANOVA?

Study Design: I showed participants some information about sea-level rise, focusing the information in different ways, both in terms of the time-scale and the magnitude of potential rise. Thus I had a ...
1
vote
1answer
292 views

ANOVA - independence assumption

I have conducted a study in which I have gathered 3 sentences per participant. These sentences were then classified and the words per sentence were counted. I want to test if there are significant ...
7
votes
2answers
4k views

Understanding repeated measure ANOVA assumptions for correct interpretation of SPSS output

I am investigating whether different reward conditions may affect task performance. I have data from a small study with two groups, each with n=20. I collected data on a task that involved performance ...
15
votes
3answers
8k views

ANOVA assumption normality/normal distribution of residuals

The Wikipedia page on ANOVA lists three assumptions, namely: Independence of cases – this is an assumption of the model that simplifies the statistical analysis. Normality – the distributions of the ...