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Data for Exercise 7.56
Spelling
A data frame with 9 observations on the following 3 variables.
Before
a numeric vector
After
differ
# NOT RUN { str(Spelling) attach(Spelling) qqnorm(differ) qqline(differ) shapiro.test(differ) t.test(After,Before,paired=TRUE,alternative="greater") detach(Spelling) # }
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