search for: post_banana

Hi everyone- I have a dataset with multiple "pre" and "post" variables I want to compare. The variables are named "apple_pre" or "pre_banana" with the corresponding post variables named "apple_post" or "post_banana". The variables are in no particular order. apple_pre orange_pre orange_post pre_banana apple_post post_banana person_1 person_2 person_3 ... person_x How do I: 1. Run a series of paired t-tests for the apple_pre variables and pre_banana variables? Would be great to do something like ttest(...