bootSlope: Bootstrap the slope of a simple linear regression line

In CarletonStats: Functions for Statistics Classes at Carleton College

Bootstrap the slope of a simple linear regression line

Description

Bootstrap theslope of a simple linear regression line. The bootstrap mean and standard error are printed as well as a bootstrap percentile confidence interval.

Usage

bootSlope(x, ...)

## Default S3 method:
bootSlope(
  x,
  y,
  conf.level = 0.95,
  B = 10000,
  plot.hist = TRUE,
  xlab = NULL,
  ylab = NULL,
  title = NULL,
  plot.qq = FALSE,
  x.name = deparse(substitute(x)),
  y.name = deparse(substitute(y)),
  seed = NULL,
  ...
)

## S3 method for class 'formula'
bootSlope(formula, data, subset, ...)

Arguments

x	a numeric vector.
...	further arguments to be passed to or from methods.
y	a numeric vector.
conf.level	confidence level for the bootstrap percentile interval.
B	number of times to resample (positive integer greater than 2).
plot.hist	a logical value. If TRUE, plot the bootstrap distribution of the resampled slope.
xlab	an optional character string for the x-axis label
ylab	an optional character string for the y-axis label
title	an optional character string giving the plot title
plot.qq	a logical value. If TRUE a normal quantile-quantile plot of the bootstraped values is created.
x.name	Label for variable x
y.name	Label for variable y
seed	optional argument to set.seed
formula	a formula of the form lhs ~ rhs where lhs is a numeric variable giving the data values and rhs a factor with two levels giving the corresponding groups.
data	an optional data frame containing the variables in the formula formula. By default the variables are taken from environment(formula).
subset	an optional vector specifying a subset of observations to be used.

Details

Observations with missing values are removed.

Value

The command returns the slopes of the resampled observations.

Methods (by class)

• bootSlope(default): Bootstrap the slope of a simple linear regression line

• bootSlope(formula): Bootstrap the slope of a simple linear regression line

Author(s)

Adam Loy, Laura Chihara

References

Tim Hesterberg's website https://www.timhesterberg.net/bootstrap-and-resampling

Examples

plot(states03$ColGrad, states03$InfMortality)
bootSlope(InfMortality ~ ColGrad, data = states03, B = 1000)
bootSlope(states03$ColGrad, states03$InfMortality, B = 1000)

CarletonStats documentation built on Aug. 22, 2023, 5:06 p.m.