Table 4. Summary of the means, standard deviations (SD), ranges, and results of Shapiro–Wilk test of δ¹³C and δ¹⁵N for the groups cereals, animals, and humans and their respective subgroups.

		δ13C					δ15N**
		Mean ± SD	SEM	Range	Shapiro–Wilk test		Mean ± SD	SEM	Range	Shapiro–Wilk test
	N	[‰]	[‰]	[‰]	W	P	[‰]	[‰]	[‰]	W	p
Cereals	14	−23.47 ± 1.50	± 0.201	−24.87 to −21.55	0.92	0.234	6.54 ± 2.15	± 0.287	4.70 to 8.57	0.98	0.963
T. dicoccum	10	−23.31 ± 1.48	-	−24.17 to −21.55	0.88	0.118	6.70 ± 2.20	-	4.90 to 8.57	0.99	0.999
T. monococcum	4	−23.87 ± 1.41	-	−24.87 to −23.29	0.88	0.349	6.13 ± 2.06	-	4.70 to 7.00	0.90	0.414
Animals	13	−20.85 ± 1.46	± 0.202	−22.70 to −20.10	0.87	0.049*	9.26 ± 2.58	± 0.357	7.35 to 11.10	0.92	0.267
Herbivores	7	−20.76 ± 1.81	-	−22.70 to −20.10	0.74	0.009*	9.60± 2.15	-	8.40 to 11.10	0.90	0.311
Sus scrofa	1	-	-	−20.2	-	-	-	-	10.3	-	-
undetermined	5	−21.11 ± 0.79	-	−21.73 to −20.78	0.88	0.316	8.57 ±2.94	-	7.35 to 10.99	0.86	0.225
Humans	8	−19.90 ± 0.40	± 0.115	−20.10 to −19.70	0.89	0.242	12.20 ± 1.51	± 0.436	11.50 to 13.00	0.99	0.780

For the categories animals and herbivores, a non-normal distribution of the δ¹³C values (p<0.05) is indicated by a *. SD = standard deviation. Standard error of the mean (SEM) for groups is that used in the FRUITS food web model.

** δ¹⁵N of cereals adjusted by −0.5‰ for charring.