Weights required to stretch springs of four brands by 0.1 inches.
A data frame with 24 observations on the following 2 variables.
A factor with 4 levels giving the brands of springs.
A numeric vector giving the weight required to extend the spring by 0.1 inches.
Nelson, P. R., Wludyka, P. S., Copeland, K. A. F. (2005) The Analysis of Means: A Graphical Method for Comparing Means, Rates, and Proportions. Society for Industrial and Applied Mathematics (SIAM), Philadelphia, PA, and American Statistical Association (ASA), Alexandria, VA, p. 53.
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