Estimate Means Interaction

Provides the confidence intervals for the simple effects and the interaction contrast in a 2x2 design.

Usage

# S3 method for data.frame
estimateMeansInteraction(frame, by, conf.level=.95, ...)

# S3 method for formula
estimateMeansInteraction(formula, by, conf.level=.95, ...)

# S3 method for bsm
estimateMeansInteraction(moments, conf.level=.95, ...)

# S3 method for wsm
estimateMeansInteraction(moments, corrs, conf.level=.95, ...)

Arguments

frame

a set of (non-empty) numeric vectors of data values

formula

a formula of the form lhs ~ rhs where lhs is a numeric variable giving the data values and rhs a factor giving the corresponding groups

moments

a list of matrices/frames of descriptive/summary statistics

corrs

a list of matrices/frames of correlations

by

a factor used for blocking

conf.level

confidence level of the interval

Value

The returned frame contains the following components:

Est

the contrasts for the simple effects and the interaction

SE

the standard errors for the simple effects and the interaction

df

the degrees of freedom for the simple effects and the interaction

LL

the lower limit of the confidence intervals for the simple effects and the interaction

UL

the upper limit of the confidence intervals for the simple effects and the interaction