Table 3.

Estimation Accuracy by Sex and Drink Type

Estimation accuracy	Wine			Spirits
	Men	Women	Total	Men	Women	Total
Overall
n	111	137	248	97	95	192
Mean diff	−0.34	−0.08	−0.20	−0.84	−0.43	−0.64
SD	1.03	1.00	1.02	1.61	1.31	1.48
Within 0.5 units
n	61	68	129	42	38	80
%	55.0	49.6	52.0	43.3	40.0	41.7
Mean diff	0.02	0.00	0.01	0.00	0.00	0.00
SD	0.28	0.31	0.30	0.29	0.24	0.27
Underestimated by >0.5 units
n	15	31	46	12	20	32
Percentage	13.5	22.6	18.5	12.4	21.1	16.7
Mean diff	0.77	1.11	1.00	0.80	1.02	0.94
SD	0.31	0.83	0.72	0.20	0.55	0.46
Overestimated by >0.5 units
n	35	38	73	43	37	80
Percentage	31.5	27.7	29.4	44.3	38.9	41.7
Mean diff	−1.43	−1.20	−1.31	−2.12	−1.66	−1.91
SD	1.11	0.69	0.92	1.62	1.17	1.44

diff, difference.