p13.7

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

datasets

Most of this package consists of data sets from the
textbook Introduction
to Linear Regression Analysis, by Montgomery, Peck
and Vining.  All data sets from the 3rd edition are included
and many from the 6th edition are also included.
The package also contains some additional data sets and functions.

W.J. Braun

Data Sets from Montgomery, Peck and Vining

S. MacQueen

p13.7 function

This data frame contains the following columns:<dl>
 <dt>y</dt>
<dd>number of fractures in upper seams of coal mines</dd> <dt>x1</dt>
<dd>inner burden thickness (in feet), 
shortest distance between seam floor and the lower
seam</dd> <dt>x2</dt>
<dd>percent extraction of the lower previously
mined seam</dd> <dt>x3</dt>
<dd>lower seam height (in feet)</dd> <dt>x4</dt>
<dd>time that the mine has been in operation (in years)</dd> 
</dl>

Format

Data Set for Problem 13-7 — p13.7

This data frame contains the following columns:<dl>
 <dt>y</dt>
<dd>number of fractures in upper seams of coal mines</dd>

 <dt>x1</dt>
<dd>inner burden thickness (in feet), 
shortest distance between seam floor and the lower
seam</dd>

 <dt>x2</dt>
<dd>percent extraction of the lower previously
mined seam</dd>

 <dt>x3</dt>
<dd>lower seam height (in feet)</dd>

 <dt>x4</dt>
<dd>time that the mine has been in operation (in years)</dd>

 
</dl>

p13.7: Data Set for Problem 13-7

Description

Usage

Arguments

Format

References

Examples