ex0726 {Sleuth2}

Decline in Male Births

Description

The data are on the proportion of male birts in Denmark, The Netherlands, Canada and the United States for a number of yeras. Notice that the proportions for Canada and the United States are only provided for the years 1970 to 1990, while Denmark and The Netherlands have data listed for 1950 to 1994.

Usage

ex0726

Format

A data frame with 45 observations on the following 5 variables.

Year

year of observation

Denmark

male birth rate of Denmark for given year

Netherlands

male birth rate of The Netherlands for given year

Canada

male birth rate of Canada for given year

Usa

male birth rate of the United States for given year

Source

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

References

Davis, D.L., Gottlieb, M.B. and Stampnitzky, J.R. (1998). Reduced ratio of male to female births in several industrial countries, Journal of the American Medical Association 279(13): 1018–1023.

Examples

str(ex0726)