DAAG (version 1.17)

onesamp: Paired Sample t-test

Description

This function performs a t-test for the mean difference for paired data, and produces a scatterplot of one column against the other column, showing whether there was any benefit to using the paired design.

Usage

onesamp(dset, x="unsprayed", y="sprayed", xlab=NULL, ylab=NULL,
        dubious=NULL, conv=NULL, dig=2)

Arguments

dset

a matrix or dataframe having two columns

x

name of column to play the role of the `predictor'

y

name of column to play the role of the `response'

xlab

horizontal axis label

ylab

vertical axis label

dubious

vector of logical (FALSE/TRUE) values, specifying points that are to be omitted

conv

scaling factor that should be applied to data

dig

round SE to this number of digits for dispplay on graph

Value

• A scatterplot of y against x together with estimates of standard errors and standard errors of the difference (y-x). Also produced is a confidence interval and p-value for the test.

Examples

onesamp(dset = pair65, x = "ambient", y = "heated", xlab =
        "Amount of stretch (ambient)", ylab =
        "Amount of stretch (heated)")