3. If the Starting salaries in thousand dollars in a company as follows: 41 38 39 45 47 41 44 41 37 42 Using mean, standard deviation; do you think that salaries in the company are consistent ? why? 4. Suppose two machines produce nails which are on average 10 inches long. A sample of 11 nails is selected from each machine. Machine A: 6, 8, 8, 10, 10, 10, 10, 10, 12, 12, 14 Machine B:6, 6, 6, 8, 8, 10, 12, 12, 14, 14, 14 Which machine do you prefer? O Based on standard deviation and coefficient of variation