Averages in practice

Exercise and reference answers

Questions

1. Question

   The mean of 4, 8 and 12 is

   Choices

   1. 12
   2. 8
   3. 24

   Correct choice

   8

2. Question

   The range of 4, 8 and 12 is

   Choices

   1. 4
   2. 12
   3. 8

   Correct choice

   8

3. Question

   Adding a value of 100 to that set would

   Choices

   1. raise the mean sharply
   2. leave the mean alone
   3. lower the mean

   Correct choice

   raise the mean sharply

4. Question

   Which statistic ignores the middle values entirely?

   Choices

   1. the mean
   2. the range
   3. the standard deviation

   Correct choice

   the range

Explanation