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Do you know population SD?. Yes. No. Use Z Test. Are there only 2 groups to Compare?. Yes - Only 2. No - More than 2. No - More than 2 Groups. Yes - Only 2 Groups. Use ANOVA. Do you have Independent data?. If F not Significant, Retain Null. If F is Significant,
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Do you know population SD? Yes No Use Z Test Are there only 2 groups to Compare? Yes - Only 2 No - More than 2
No - More than 2 Groups Yes - Only 2 Groups Use ANOVA Do you have Independent data? If F not Significant, Retain Null If F is Significant, Reject Null No Yes
Do you have Independent data? If F not Significant, Retain Null If F is Significant, Reject Null No Yes Compare Means With Multiple Comparison Tests Use Independent Sample T test Use Paired Sample T test
Use Independent Sample T test Use Paired Sample T test Is t test Significant? Yes No Compare means Reject Null Hypothesis Retain Null Hypothesis