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. 2012 Mar 15;26(2):198–212. doi: 10.1002/bdm.1751

Table 4.

Descriptive statistics for numeracy measures—Study 1

Scale Mean (SD) Median Mode Skewness
CRT (three items) 0.83 (.99) 0 0 .88
Schwartz et al. (three items) 1.8 (1.01) 2 2 –.36
Lipkus et al. (11 items) 8.15 (2.36) 9 10 –.94
Peters et al. (15 items) 10.48 (2.81) 11 12 –.98
Rasch‐based (eight items) 4.13 (1.87) 4 4 .00