A researcher is curious about the effect of sleep on students' test performances. He chooses 50 students and gives each two tests: one given after four hours of sleep and one after eight hours of sleep. The test the researcher should use would be matched pairs t-test.

Matched Pairs T-test

A statistical procedure that compares the average values of two connected groups to ascertain if the difference between them is significant from a statistical standpoint.

Sleep Effect

A concept in psychology and physiology referring to the impact of sleep quality and duration on various aspects of an individual’s health and daily performance.