1. The data below are from an independent-measures experiment comparing three different drug dosages on the level of activity in rats.

No Drug	Small dose	Large Dose
5	5	10
3	5	12G=
1	9	9 X2=
1	6	6
5	5	8
T=	T=	T=
SS=	SS=	SS=

1. Explain why an ANOVA should be used instead of a series ofttests to evaluate the mean differences among the three treatment conditions.
2. Use an analysis of variance with = .05 to determine whether these data indicate any significant mean differences among the treatment conditions.