A researcher predicts that practice improves children' s accuracy on a fine motor skills game (high score indicates high accuracy). He tests the children before and after 15 minutes of practice.What is the appropriate analysis of the following data?

Independent Sample t-test, 1 tailed

Independent Sample t-test, 2 tailed

Paired Sample t-test, 1 tailed

Paired Sample t-test, 2 tailed