ex0915: Rainfall and Corn Yield

Description Usage Format Source References Examples

Description

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

1

Format

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)

Source

Ramsey, F.L. and Schafer, D.W. (2002). The Statistical Sleuth: A Course in Methods of Data Analysis (2nd ed), Duxbury.

References

Ezekiel, M. and Fox, K.A. (1959). Methods of Correlation and Regression Analysis, John Wiley \& Sons, New York.

Examples

1

Example output

'data.frame':	38 obs. of  3 variables:
 $ Year    : num  1890 1891 1892 1893 1894 ...
 $ Yield   : num  24.5 33.7 27.9 27.5 21.7 ...
 $ Rainfall: num  9.6 12.9 9.9 8.7 6.8 ...

Sleuth2 documentation built on Jan. 24, 2019, 9:04 a.m.