ex10.09 data frame has 24 rows and 2 columns.
A data frame with 24 observations on the following 2 variables.
a numeric vector
a factor with levels
Consult the web site http://www.thomsonedu.com/statistics/devore for additional online resources that are available for this book.
Devore, J. L. (2008) Probability and Statistics for Engineering and the Sciences (7th Edition), ISBN-10: 0495382175 ISBN-13: 9780495382171