Mean and Median

June 8, 2013

(This article was first published on Analysis with R, and kindly contributed to R-bloggers)

Mean in R is computed using the function mean. Consider the scores of 20 MSU-IIT students in Stat 101 exam with a hundred items: 70, 78, 66, 65, 50, 53, 48, 88, 95, 80, 85, 84, 81, 63, 68, 73, 75, 84, 49, and 77. Compute and interpret the mean and median.

Interpretation: Therefore, the average score of the students is 71.6, and half of their scores are less than or equal to 74, while the other half are greater than 74.

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