Alpha Values Use this field to specify the alpha value(s) across which to compute power. • You can specify a single numerical value, a fixed set of values separated by commas, or a range of values like 0.01 to 0.05 by 0.01. • All values must be between 0 and 1. • To control for multiple testing, specify very small values. To Specify Alpha Values: Type the value or values in the Alpha Values text field.