Decision Tree: More Than Two Independent Groups

You may use

One-Way (Single Factor) ANOVA

Doing one-way ANOVA using:

• SPSS
• MS-Excel
• VassarStats' Online Statistical Calculation page

Journal Articles:

• "Comparison of children's self-reports of depressive symptoms among different family interaction types in northern Taiwan" by Wu, Kao, Yen & Lee (2007) [html, pdf]
• "Comparing attitudes about legal sanctions and teratogenic effects for cocaine, alcohol, tobacco and caffeine: A randomized, independent samples design" by Ginsburg, Raffeld, Alanis & Boyce (2006) [html, pdf]