E1.1 {SenSrivastava}

Data on density of vehicles and average speed

Description

The E1.1 data frame has 24 rows and 2 columns.

Usage

data(E1.1)

Format

This data frame contains the following columns:

DENSITY

a numeric vector, vehicles per mile.

SPEED

a numeric vector, miles per hour.

Details

Example 1.1 page 2 in Sen and Srivastava.

Source

Huber, M.J (1957) Effect of temporary bridge on Parkway performance. Highway Research Board Bulletin 167 63–74.

Examples

data(E1.1)
attach(E1.1)
plot(DENSITY, sqrt(SPEED))
E1.1.m1 <- lm(sqrt(SPEED) ~ DENSITY + I(DENSITY^2), data=E1.1)
summary(E1.1.m1)