Use R to calculate the mean and median of the data in Exercise 4.1. The commands are of the form xbar

Exercise 4.1

As part of the Katz et al. (1990) study that examined test performance on a passage that a group of students had not read, the experimenters obtained the same kind of data from a smaller group of students who had read the passage (called the Passage group). Their data follow.

Transcribed Image Text:

66 75 72 71 55 56 72 93 73 72 72 73 91 66 71 56 59