A local city is considering building a new train to alleviate the heavy traffic on its highways.
To find out how many people would make use of this new train, a government worker went out and interviewed a random sample of commuters. The following are the number of miles driven each week by 10 people who said that they would use the train instead of driving to work:
150 750 300 425 175 600 450 250 900 275
Calculate the
(a) Range,
(b) Inter-quartile range, and
(c) Variance and standard deviation.