Table 1.

Statistical table

	Data structure	Type of test	Power
a	Normal distribution	Two-tailed unpaired Student’s t test	p = 0.37
b	Normal distribution	Two-tailed unpaired Student’s t test	p = 1.9 × 10⁻⁸
c	Normal distribution	Two-tailed unpaired Student’s t test	p = 9.8 × 10⁻⁷