Test scores for two beginning statistics classes

Data for Exercises 1.70 and 1.87

Statisti

Format

A data frame/tibble with 62 observations on two variables

class

character variable with values Class1 and Class2

score

test score for an introductory statistics test

References

Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Pacific Grove, CA: Brooks/Cole, a division of Thomson Learning.

Examples

boxplot(score ~ class, data = Statisti, col = "violet")

tapply(Statisti$score, Statisti$class, summary, na.rm = TRUE)
#> $Class1
#>    Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
#>   64.00   75.00   80.00   78.58   83.00   90.00 
#> 
#> $Class2
#>    Min. 1st Qu.  Median    Mean 3rd Qu.    Max.    NA's 
#>   65.00   75.00   79.00   80.81   88.00   97.00       4 
#> 
if (FALSE) {
library(dplyr)
dplyr::group_by(Statisti, class) %>%
 summarize(Mean = mean(score, na.rm = TRUE), 
           Median = median(score, na.rm = TRUE), 
           SD = sd(score, na.rm = TRUE),
           RS = IQR(score, na.rm = TRUE))
}