DSE 數學科：統計

1. What is the mean of 4, 6, 6, 10 and 14?

2. For the data 3, 5, 7, 8, 20, which measure is most affected by the extreme value 20?

3. If every score in a data set is increased by 5, what happens?

4. If every value in a data set is multiplied by 3, the standard deviation is

5. The interquartile range is

6. In a histogram with unequal class widths, one class is twice as wide as another and both have the same frequency. Its bar should be

7. Which statement about the standard deviation used in the compulsory part is correct?

8. A set has mean 50 and standard deviation 4. After the coding y = (x − 50)/2, what is the standard deviation of y?

9. A bar chart starts the vertical axis at 40 instead of 0. What is the most likely effect?

10. For a symmetric unimodal distribution, which relation is the typical one?

11. The variance of a data set is

12. A student says, 'The class average rose, so every student improved.' Why is this an abuse of the average?