Mathematical assessment scores for 36 students enrolled in a biostatistics course according to whether or not the students had successfully completed a calculus course prior to enrolling in the biostatistics course
A data frame with 18 observations on the following 2 variables:
assessment score for students with no prior calculus
assessment score for students with prior calculus
Ugarte, M. D., Militino, A. F., and Arnholt, A. T. (2008) Probability and Statistics with R. Chapman & Hall/CRC.
#> [1] 18.32775 30.33892 #> attr(,"conf.level") #> [1] 0.95