CIest: Confidence Interval Estimation

In sasLM: 'SAS' Linear Model

Confidence Interval Estimation

Description

Get the point estimate and its confidence interval with a given contrast and alpha value using the t distribution.

Usage

  CIest(Formula, Data, Term, Contrast, conf.level=0.95) 

Arguments

Formula	a conventional formula for a linear model
Data	a data.frame to be analyzed
Term	a factor name to be estimated
Contrast	a level vector. Levels are alphabetically ordered by default.
conf.level	confidence level of the confidence interval

Details

Get the point estimate and its confidence interval with a given contrast and alpha value using the t distribution.

Value

Estimate	point estimate of the input linear contrast
Lower CL	lower confidence limit
Upper CL	upper confidence limit
Std. Error	standard error of the point estimate
t value	value for the t distribution
Df	degrees of freedom
Pr(>|t|)	probability of a larger absolute t value from the t distribution with the residual degrees of freedom

Author(s)

Kyun-Seop Bae [e-mail]

Examples

  CIest(log(CMAX) ~ SEQ/SUBJ + PRD + TRT, BEdata, "TRT", c(-1, 1), 0.90) # 90% CI

sasLM documentation built on June 15, 2026, 9:07 a.m.