You are a therapist that has developed a new app to help people treat their anxiety.  You would like to compare the outcomes of people that use the app to those that receive therapy services.  You recruit 50 participants that identify as having problems with anxiety and you randomly assign each person to either use the app for 1 month or come in for therapy for 1 month.  At the end, you give everyone an anxiety measure so that you can compare the difference between the two groups.  Which statistical test would be best to determine if there is a significant difference in anxiety between the two groups following an intervention?     one-sample t-test     related Samples t-test     independent samples t-test     ANOVA

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