I'm conducting a research study on the effect of marijuana usage on tournament performance in Super Smash Brothers UltimateTo do so, I select a group of 17 Tuscaloosa Super Smash Brothers Ultimate Competitors and administer a survey regarding marijuana consumption for the past 4 years. Then, I compare their answers to their tournament results over the past 4 years

I run a Pearson Product Moment Correlation and get an r value of 0.8

1). What is the strength of the association?

2). What is the direction of the association?

3). Do we need to run an "Effect Size" Calculation?

4). Can we conclude that marijuana usage positively impacts performance?

Explain using "Mil's Canons"