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.
A data frame with 45 observations on the following 5 variables.
year of observation
male birth rate of Denmark for given year
male birth rate of The Netherlands for given year
male birth rate of Canada for given year
male birth rate of the United States for given year
Ramsey, F.L. and Schafer, D.W. (2002). The Statistical Sleuth: A Course in Methods of Data Analysis (2nd ed), Duxbury.
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.
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