Power Analysis: Grid Values

The Grid Values dialog provides options for specifying a range of POWER values for the purpose of viewing projected sample sizes in a grid format for every specified POWER range value.

The Grid Values dialog is available for every Power Analysis procedure when the Estimate sample size and Grid power values options are selected (click the Grid control to display the dialog).

Specify single power: When selected, at least one value is required to run the analysis. Multiple values are allowed and each value must belong to [0, 1]. You can specify multiple values with each value separated by a blank space (or blank spaces). Use the Add, Change, and Remove controls to work with the values in the power value list.; All values must be unique (duplicate values are not allowed).
Specify power range: When selected, a range of power values can be specified from a Start value (value1) to an End value (value2) with the increment of By (value3). If specified, only one valid set of [value1 TO value2 BY value3] is allowed. It must satisfy that 0 ≤ value1 ≤ value2 ≤ 1. In cases where value1 = value2, it is equivalent to specifying a single value1, regardless of value3.

Note: The Specify single power and Specify power range options are independent; you can select a single option or both options.

Refer to the following introductory video for a brief overview on Grid Values: