An air traffic controller is using radar to track the position of an airplane moving due east at a constant speed. The table below shows the position of the aircraft on her screen, relative to the left edge, and the time at which the aircraft was spotted. Position (cm) 0 0.70 1.40 2.10 3.50 Time (minutes) 0 0.25 0.50 0.75 1.25 If each centimeter on the screen represents 5 kilometers, what is the speed that the airplane is flying in kilometers per hour? kilometers per hour

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