naive: naive

In rnorberg/bastudy: A Package for Before and After Traffic Studies

Description

Calculates Crash Modification Factor (CMF) for a before/after traffic study using Naive method

Usage

naive(before, after, depVar, db = 1, da = 1, alpha = 0.95)

Arguments

before	Treatment data, before some change was made
after	Treatment data, after some change was made
depVar	The dependent variable (the number of crashes - should always be of class integer or numeric).
db	duration of before period (typically years)
da	duration of after period (typically years)
alpha	Level of confidence

Details

None at this time

Value

Returns a list object containing the CMF, its variance, standard error, and 1-alpha/2 CI

Author(s)

Jung-han Wang and Robert Norberg

Examples

data(Before)
data(After)
naive(before = Before, after = After, depVar = "kabco", db = 1, da = 3, alpha = 0.9)

rnorberg/bastudy documentation built on May 27, 2019, 9:57 a.m.