Drug Testing Often Involves Giving Participants Each of the Several

Essay

Drug testing often involves giving participants each of the several dosages as well as a placebo (an inert substance). In this study, the dependent variable was reaction time in hundredths of a second. Calculate a repeated-measures ANOVA, Tukey HSD tests, and write an interpretation. $$\begin{array} { c c c c c } && { \text { Dosage } } \\\text { Participant } & \text { Placebo } & 15 \mathrm { mg } & 30 \mathrm { mg } & 60 \mathrm { mg } \\\hline 1 & 36 & 32 & 20 & 18 \\2 & 35 & 40 & 25 & 27 \\3 & 40 & 42 & 30 & 24\end{array}$$