Spelling scores for 9 eighth graders before and after a 2-week course of instruction
Data for Exercise 7.56
Spelling
A data frame/tibble with nine observations on three variables
spelling score before a 2-week course of instruction
spelling score after a 2-week course of instruction
after - before (spelling score)
Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Pacific Grove, CA: Brooks/Cole, a division of Thomson Learning.
qqnorm(Spelling$differ) qqline(Spelling$differ) shapiro.test(Spelling$differ) t.test(Spelling$before, Spelling$after, paired = TRUE) t.test(Spelling$differ)
Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.