A researcher is conducting a study comparing the effects of drug treatments on hours of sleep across three groups. Group 1 is taking Drug A, Group 2 is taking Drug B, and Group 3 is a control group not taking any drug. What statistic would be most appropriate to compare the mean number of hours of sleep across the three groups?

Select one:

a. paired samples t test

b. independent t test

c. analysis of variance

d. facto analysis