Suppose a deep sea diver dives from the surface to 85 feet below the surface. He then dives down 14 more feet. The diver's depth is represented by the sum - 85+ (-14). Find and interpret the sum to
describe the diver's present depth.
Find the sum.
- 85+ (-14) =
What is the diver's present depth?
O-99 feet below the surface
- 71 feet below the surface
O 71 feet below the surface
O 99 feet below the surface

If your score on your next statistics test is converted to a z score, which of these z scores would you prefer: minus2.00, minus1.00, 0, 1.00, 2.00? why? a. the z score of 2.00 is most preferable because it is 2.00 standard deviations above the mean and would correspond to the highest of the five different possible test scores. b. the z score of 0 is most preferable because it corresponds to a test score equal to the mean. c. the z score of minus2.00 is most preferable because it is 2.00 standard deviations below the mean and would correspond to the highest of the five different possible test scores. d. the z score of minus1.00 is most preferable because it is 1.00 standard deviation below the mean and would correspond to an above average