Averages in a data question

Exercise and reference answers

Questions

1. Question

   'Average marks of the class' asks for the

   Choices

   1. range
   2. mean
   3. standard deviation

   Correct choice

   mean

2. Question

   'How widely did marks vary' asks for a

   Choices

   1. measure of central tendency
   2. total
   3. measure of dispersion

   Correct choice

   measure of dispersion

3. Question

   The mean of 10, 20 and 30 is

   Choices

   1. 20
   2. 30
   3. 60

   Correct choice

   20

Explanation