Breakdown times of an insulating fluid under various levels of voltage stress
Data for Exercise 5.76
Fluid
A data frame/tibble with 76 observations on two variables
a character variable showing kilowats
breakdown time (in minutes)
E. Soofi, N. Ebrahimi, and M. Habibullah, 1995.
Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Pacific Grove, CA: Brooks/Cole, a division of Thomson Learning.
DF1 <- Fluid[Fluid$kilovolts == "34kV", ] DF1 # OR DF2 <- subset(Fluid, subset = kilovolts == "34kV") DF2 stem(DF2$time) SIGN.test(DF2$time) ## Not run: library(dplyr) DF3 <- dplyr::filter(Fluid, kilovolts == "34kV") DF3 ## End(Not run)
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