These data are the prevalence of autism per 10,000 ten-year old children in the United States in 1992, 1994, 1996, 1998, and 2000.
A data frame with 5 observations on the following 2 variables.
the number of autism cases per 10,000 ten-year old children
Ramsey, F.L. and Schafer, D.W. (2013). The Statistical Sleuth: A Course in Methods of Data Analysis (3rd ed), Cengage Learning.
Newschaffer, C. J., Falb, M. D. and Gurney, J. G. (2005) National Autism Prevalence Trends From United States Special Education Data, Pediatrics 115: e277–e282.