p13.7 {MPV}

Data Set for Problem 13-7

Description

The p13.7 data frame has 44 observations on the coal mines of the Appalachian region of western Virginia.

Usage

data(p13.7)

Format

This data frame contains the following columns:

y

number of fractures in upper seams of coal mines

x1

inner burden thickness (in feet), shortest distance between seam floor and the lower seam

x2

percent extraction of the lower previously mined seam

x3

lower seam height (in feet)

x4

time that the mine has been in operation (in years)

Source

Montgomery, D.C., Peck, E.A., and Vining, C.G. (2001) Introduction to Linear Regression Analysis. 3rd Edition, John Wiley and Sons.

References

Myers (1990)

Examples

data(p13.7)