5. The Summary Statistics tells us that the Standard deviation is about 4.4. What does this mean? [3 marks]

6. Is the above Standard deviation a statistic or a parameter? Explain your answer. [2 marks]

7. Is the standard deviation an appropriate measure of variability in sugar content in breakfast cereals? Explain your answer. [3 marks]

8. A cereal with 12 gr of sugar or more per serving is considered to be unhealthy. What percentage of the cereals in the sample are considered unhealthy by this definition? Use the Stem-and-Leaf display. Note that each row (stem) in the display has a range of 2 values, not 10. e.g., the first row has a range of values from 0 to 1, instead of 0 to 9, the second row ranges from 2 to 3, etc. [2 marks]