What statistical test do I need?

#1
So if you have a study measuring depression for users who prefer to use Twitter, then users who prefer Facebook and then users of Instagram, what statistical test would you use?
 

Karabiner

TS Contributor
#2
If depression was measured on a continuous scale and total sample size < 30: Kruskal-Wallis H test. If If depression was measured on a continuous scale and total sample size >= 30: oneway analysis of variance with Welch correction, or Brown-Forsythe correction, for unequal variances. If depression is categorical (e.g. depressed yes/no), then Chi² test.

With kind regards

Karabiner