The table below shows the cost of mailing a postcard in different years. During which time interval did the cost increase at the
greatest average rate?
Year
1898 1971
1985 2006 2012
14 24 35
Cost (€)
1
6
(Α)
1898-1971
C
1985-2006
B
1971-1985
D 2006-2012

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