Length of long-distance phone calls for a small business firm
Data for Exercise 6.95
Phone
A data frame/tibble with 20 observations on one variable
duration of long distance phone call (in minutes)
Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Pacific Grove, CA: Brooks/Cole, a division of Thomson Learning.
qqnorm(Phone$time) qqline(Phone$time) shapiro.test(Phone$time) SIGN.test(Phone$time, md = 5, alternative = "greater")
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