ex0915: Rainfall and Corn Yield

In Sleuth3: Data Sets from Ramsey and Schafer's "Statistical Sleuth (3rd Ed)"

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

ex0915

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)

Source

Ramsey, F.L. and Schafer, D.W. (2013). The Statistical Sleuth: A Course in Methods of Data Analysis (3rd ed), Cengage Learning.

References

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

Examples

str(ex0915)

Example output

'data.frame':	38 obs. of  3 variables:
 $ Year    : int  1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 ...
 $ Yield   : num  24.5 33.7 27.9 27.5 21.7 31.9 36.8 29.9 30.2 32 ...
 $ Rainfall: num  9.6 12.9 9.9 8.7 6.8 12.5 13 10.1 10.1 10.1 ...

Sleuth3 documentation built on May 2, 2019, 6:41 a.m.