Augusto wants to prove to his parents that watching TV while he does his homework will help him get better grades. He decides to ask 20 of his friends if they watch TV while they do their homework and what their grades are. He finds that his friends who have high grades also watch TV while they do their homework. He tells his parents that he has proven that watching TV while doing HW will cause his grades to improve. What mistake did Augusto make?

Question

anonymous · Answer

@mathstudent55 
@kirbykirby 
@satellite55

anonymous · Answer

He did not use a random sample and he tried to show cause and effect with an observational study.

He didn't use a random sample, and he tried to show cause an effect with an experiment

He didn't separate his friends into different groups and he didn't apply a treatment. 

He didn't separate his friends into different grous and he used a survey to collect data

kirbykirby · Answer

i would agree

anonymous · Answer

thank you