A company is researching mining at four different land areas using different types of equipment. The table below shows the costs of land, equipment, mining, and reclamation for the four locations: Locations Cost of land Cost of equipment Cost of mining and reclamation Time taken to mine the area 1 $100,000 $10,000 $5,000 per day 30 days 2 $35,000 $6,000 $4,500 per day 45 days 3 $30,000 $7,500 $3,500 per day 120 days 4 $40,500 $8,000 $7,000 per day 65 days Which location will cost the most for mining and reclamation at the end of the mining period? Location 1 Location 2 Location 3 Location 4

7. see worksheet 1 for values of variables x1, x2 and x3 and answer the following questions: a. for each variable find the mean, median, coefficient of skewness, range and population standard deviation. b. compared to variable x1, how are the mean and median affected by extreme values (outliers) seen in x2 and x3. c. is the median or mean the better measure of location for x2 and x3? explain. d. explain the differences in the magnitudes of the skewness coefficients for the three variables. e. what is the relationship between the range and standard deviation looking across the three variables?