Averages and spread

Exercise and reference answers

Questions

1. Question

   Which describes where the data centres?

   Choices

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

   Correct choice

   the mean

2. Question

   Which describes how scattered the data is?

   Choices

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

   Correct choice

   the standard deviation

3. Question

   Range equals

   Choices

   1. sum over count
   2. the middle value
   3. maximum minus minimum

   Correct choice

   maximum minus minimum

4. Question

   The mean is found by

   Choices

   1. dividing the total by the count
   2. taking the middle value
   3. taking the commonest value

   Correct choice

   dividing the total by the count

Explanation