A biological psychologist is interested in the effect of screentime before bed on sleep quality. Sleep quality of 75 participants is assessed at 2 times: once when they had been watching TV for the hour before they went to sleep, and once when they had not had any screentime before bed. Which is the appropriate test to see if sleep quality is affected by screentime?

Correlation or regression

Dependent means t-test

Independent means t-test

One-way ANOVA

Scheff test

Single-sample t-test

z-test

?2 test