The Following 10 Scores Were Obtained on a 20-Point Quiz

Multiple Choice

The following 10 scores were obtained on a 20-point quiz: 4, 5, 8, 9, 11, 13, 15, 18, 18, and 20. The teacher computed the usual descriptive measures of centre and variability for these data, and then discovered an error was made. One of the 18s should have been a 16. Which pair of the following measures, calculated on the corrected data, would change from the original computation?

A) mean and standard deviation
B) mean and median
C) range and median
D) mean and range