Table 3.

Frequency of explanation required per format for entire sample (n = 106)*.

	Frequency of explanation (%)	Relationship to performance
Verbal label	48	U = 1346.00, p = .67, r = -0.04
Percentage	6	U = 234.50, p = .28, r = -0.10
Proportion-word	27	U = 1017.50, p = .46, r = -0.07
Proportion-notation	36	U = 1133.00, p = .26, r = -0.11
Pie chart	16	U = 735.50, p = .78, r = -0.03

* With the exception of percentage in which N = 105