PRECISION Subcommand (POWER PROPORTIONS ONESAMPLE 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 0.5. 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.

ANSCOMBE

Uses the Anscombe confidence interval.

LOGIT

Uses the Logit confidence interval.

CLOPPER_PEARSON

Uses the Clopper-Pearson confidence interval.

JEFFREYS

Uses the Jeffreys confidence interval.

WALDCC

Uses the Wald confidence interval with the continuity correction.

WILSON_SCORE

Uses the Wilson-score confidence interval.

WILSON_SCORECC

Uses the Wilson-score confidence interval with the continuity correction.

AGRESTI_COULL

Uses the Agresti-Coull confidence interval.