Source: Peixoto, J.L. (1990) A property of well-formulated polynomial regression models. American Statistician, 44, 26-30. Also found in: Hand, D.J., et al. (1994) A Handbook of Small Data Sets, London: Chap
Description: The data gives the normal average January minimum temperature in degrees Fahrenheit with the latitude and longitude of 56 U.S. cities. (For each year from 1931 to 1960, the daily minimum temperatures in January were added together and divided by 31. Then, the averages for each year were averaged over the 30 years.)
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