Mrs. Gelb is making costumes for a play. The table shows how many yards of each color ribbon are needed and how many yards she has on hand. Color Yards She Needs Yards She Has Red 2. 20 olu 2.5 Green 7 8 0.36 Black 43 mico 4.5 Tell whether each statement is True or False. a. She does not need to buy any black ribbon. b. She needs to buy yard of red ribbon. c. She needs to buy at leastyard of green ribbon.

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