Table 2.

ANOVA for the natural logarithm of three measurands: (A) area-equivalent diameter, (B) maximum Feret diameter and (C) shape factor. The p-values rejecting the null hypothesis of all frames having equal means are italicized (p < 0.05).

(A) Natural log of area equivalent				Area-equivalent diameter/nm
Laboratory	$\stackrel{‒}{x}∕\ln \left(\mathrm{nm}\right)$	s/ln(nm)	p-value
A	3.34	0.0066	0.711	28.6
B	3.33	0.0030	0.0001	27.9
C	3.33	0.0036	0.274	27.9
D	3.27	0.0067	0.168	26.4
E	3.28	0.0031	0.0010	26.7
F	3.33	0.0023	0.0026	28.0
G	3.31	0.0026	<0.0001	27.5
H	3.31	0.0038	0.106	27.4
(B) Natural log of Feret diameter				Feret diameter/nm
Laboratory	$\stackrel{‒}{x}∕\ln \left(\mathrm{nm}\right)$	s/ln(nm)	p-value
A	3.43	0.0069	0.758	31.2
B	3.40	0.0035	0.0005	30.1
C	3.41	0.0043	0.342	30.5
D	3.36	0.0065	0.413	29.0
E	3.40	0.0033	<0.0001	30.2
F	3.43	0.0030	0.138	30.9
G	3.42	0.0027	<0.0001	30.6
H	3.39	0.0040	0.0054	29.8
(C) Natural log of aspect ratio				Mean aspect ratio
Laboratory	$\stackrel{‒}{x}$	s	p-value
A	0.100	0.0036	0.904	1.11
B	0.098	0.0034	0.351	1.11
C	0.123	0.0065	<0.0001	1.15
D	0.107	0.0042	0.290	1.12
E	0.107	0.0041	0.0003	1.12
F	0.109	0.0035	0.961	1.12
G	0.108	0.0027	0.0051	1.12
H	0.089	0.0032	0.0459	1.10