Determine the first, second, and third quartiles for the data in given Exercise; then calculate the interquartile range and the quartile deviation.
Exercise
For a sample of 11 employers, the most recent hourly wage increases were 18, 30, 25, 5, 7, 2, 20, 12, 15, 55, and 40 cents per hour. For these sample data, determine:
a. The mean, median, range, and midrange.
b. The mean absolute deviation.
c. The standard deviation and variance.