PRECISION Subcommand (POWER PROPORTIONS INDEPENDENT command)

The optional PRECISION subcommand estimates the sample size based on confidence intervals. The subcommand takes effect when POWER is specified and TEST = NONDIRECTIONAL. The keyword is ignored otherwise.

HALFWIDTH = values

The optional keyword specifies the values of the confidence interval half-widths. At least one value must be specified. When multiple values are specified, they are separated by a blank space (or blank spaces). All valid values must be greater than 0 and less than or equal to 1. Duplicate values are ignored.

CITYPES

The required keyword specifies the confidence interval type and whether the continuity correction is applied. At least one of the following keywords must be specified.

WALD

Uses the Wald confidence interval.

WALDCC

Uses the Wald confidence interval with the continuity correction.

AGRESTI_CAFFO

Uses the Agresti-Caffo confidence interval.

CARLIN_LOUIS

Uses the Carlin-Louis Bayesian confidence interval with the continuity correction.

BROWN_LI_JEFFREYS

Uses the Brown-Li Jeffreys confidence interval.

HAUCK_ANDERSON

Uses the Hauck-Anderson confidence interval.

NEWCOMBE

Uses the Newcombe MOVER Wilson-score-based confidence interval.

NEWCOMBECC

Uses the Newcombe MOVER Wilson-score-based confidence interval with the continuity correction.