interval.plot: Interval Plot

In PASWR2: Probability and Statistics with R, Second Edition

Description

Function to graph intervals

Usage

interval.plot(ll, ul, parameter = 0)

Arguments

ll	vector of lower values
ul	vector of upper values
parameter	value of the desired parameter (used when graphing confidence intervals)

Value

Draws user-given intervals on a graphical device.

Author(s)

Alan T. Arnholt <[e-mail]>

Examples

set.seed(385)
samples <- 100
n <- 625
ll <- numeric(samples)
ul <- numeric(samples)
xbar <- numeric(samples)
for (i in 1:samples){
  xbar[i] <- mean(rnorm(n, 80, 25))
  ll[i] <- xbar[i] - qnorm(.975)*25/sqrt(n)
  ul[i] <- xbar[i] + qnorm(.975)*25/sqrt(n)
  }
interval.plot(ll, ul, parameter = 80)

PASWR2 documentation built on Sept. 5, 2021, 5:44 p.m.