For each scenario, decide whether the design uses independent samples (two-sample t) or dependent samples (paired t) methods
An educational researcher believes that having 6-year‑old children teach their peers in reading increases the reading level of those students involved. A class of 20 children participates in peer tutoring, while another class of 18 children, the control group, does not. At the end of the study all the children take a criterion‑referenced test to measure reading skills. The higher the test score, the better the reading skills.
A personnel manager wants to compare the mean amount of work time lost due to sickness for two types of employees, those who work on the night shift versus those who work during the day shift. Ten employees for each shift category are randomly selected, and the number of days lost due to sickness within the past year is recorded for each employee.