The following data summarize the results from an independent-measures study comparing three treatment conditions.

I	II	III
n = 6	n = 6	n = 6	N = 18
M = 1	M = 2	M = 6	G = 54
SS = 60	SS = 65	SS = 40	X = 411

Calculate the sample variance for each of the three samples.

I	II	III
s =	s =	s =

Use an ANOVA with = .05 to determine whether there are any significant differences among the three treatment means.

Source	SS	df	MS	F	Fcriticalcritical
Between treatments
Within treatments
Total

F Distribution

Numerator Degrees of Freedom = 6

Denominator Degrees of Freedom = 16

0.01.02.03.04.05.06.07.08.09.010.011.012.0F

Conclusion:

Reject the null hypothesis; there are significant differences among the three treatments.

Fail to reject the null hypothesis; there are no significant differences among the three treatments.

Reject the null hypothesis; there are no significant differences among the three treatments.

Fail to reject the null hypothesis; there are significant differences among the three treatments.