True or false: reading an average from a report

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   A high average can hide a very wide spread.

2. Statement is true

   Yes

   Statement

   The range uses only the two extreme values.

3. Statement is true

   No

   Statement

   The mean is unaffected by an extreme value.

4. Statement is true

   Yes

   Statement

   The standard deviation uses every observation.

5. Statement is true

   Yes

   Statement

   Standard deviation is the square root of the variance.

Explanation