Data on corn yield and rainfall in six U.S. corn--producing states
(Iowa, Nebraska, Illinois, Indiana, Missouri and Ohio), recorded for
each year from 1890 to 1927.
Usage
ex0915
Arguments
Format
A data frame with 38 observations on the following 3 variables.
Year
year of observation (1890--1927)
Yield
average corn yield for the six states (in bu/acre)
Rainfall
average rainfall in the six states (in in/year)
References
Ezekiel, M. and Fox, K.A. (1959). Methods of Correlation and
Regression Analysis, John Wiley & Sons, New York.