A sample of eight companies in the aerospace industry was surveyed as to their return on investment last year. The results are (in percent): 16.0, 14.5, 16.8, 13.8, 12.2, 10.8, 14.6, and 17.1.

(a)	Calculate the range. (Round your answer to 2 decimal places.)

Range

%

(b)	Calculate the arithmetic mean. (Round your answer to 2 decimal places.)

Arithmetic mean

%

(c)	Calculate the mean deviation. (Round your answer to 2 decimal places.)

Mean deviation

%