ANOVA Model
xdf2$R ~ xdf2$Inst * xdf2$Exp
names	(Intercept)	xdf2$InstNONE	xdf2$InstSCIENTIFIC	xdf2$ExpLOW	xdf2$InstNONE:xdf2$ExpLOW	xdf2$InstSCIENTIFIC:xdf2$ExpLOW
means	4.0667	-14.067	-11.011	-22.125	28.625	30.993

ANOVA Statistics
	Df	Sum Sq	Mean Sq	F value	Pr(>F)
	2
xdf2$Inst	2	338.58	169.29	1.0627	0.34976
xdf2$Exp	2	123	123	0.77212	0.38187
xdf2$Inst:xdf2$Exp	2	4729.4	2364.7	14.844	2.6333e-06
Residuals	91	14496	159.3

Tukey Honest Significant Difference Comparisons
	diff	lwr	upr	p adj
NONE-GOOD	1.1287	-6.2781	8.5354	0.92997
SCIENTIFIC-GOOD	4.4617	-3.1168	12.04	0.34376
SCIENTIFIC-NONE	3.333	-4.135	10.801	0.53915
LOW-HIGH	-2.2402	-7.3315	2.8512	0.38443
NONE:HIGH-GOOD:HIGH	-14.067	-27.273	-0.86056	0.029905
SCIENTIFIC:HIGH-GOOD:HIGH	-11.011	-23.857	1.8351	0.13631
GOOD:LOW-GOOD:HIGH	-22.125	-35.142	-9.1087	4.9302e-05
NONE:LOW-GOOD:HIGH	-7.5667	-20.413	5.2795	0.52572
SCIENTIFIC:LOW-GOOD:HIGH	-2.1436	-16.068	11.78	0.99765
SCIENTIFIC:HIGH-NONE:HIGH	3.0556	-9.5698	15.681	0.98095
GOOD:LOW-NONE:HIGH	-8.0588	-20.858	4.7401	0.45003
NONE:LOW-NONE:HIGH	6.5	-6.1253	19.125	0.66586
SCIENTIFIC:LOW-NONE:HIGH	11.923	-1.7973	25.643	0.1263
GOOD:LOW-SCIENTIFIC:HIGH	-11.114	-23.542	1.3128	0.10681
NONE:LOW-SCIENTIFIC:HIGH	3.4444	-8.8039	15.693	0.96337
SCIENTIFIC:LOW-SCIENTIFIC:HIGH	8.8675	-4.5068	22.242	0.39073
NONE:LOW-GOOD:LOW	14.559	2.1316	26.986	0.012069
SCIENTIFIC:LOW-GOOD:LOW	19.982	6.4436	33.52	0.00060348
SCIENTIFIC:LOW-NONE:LOW	5.4231	-7.9513	18.797	0.84501

Levenes Test for Homogeneity of Variance
	Df	F value	Pr(>F)
Group	5	1.7308	0.13546
	91