Reading the definitions back

Exercise and reference answers

Questions

1. Question

   A single number describing variability is called a

   Choices

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

   Correct choice

   measure of dispersion

2. Question

   Range equals

   Choices

   1. mean minus median
   2. sum divided by n
   3. maximum minus minimum

   Correct choice

   maximum minus minimum

3. Question

   Standard deviation is the square root of

   Choices

   1. the variance
   2. the range
   3. the mean

   Correct choice

   the variance

4. Question

   Mean deviation averages the

   Choices

   1. plain deviations
   2. absolute deviations
   3. squared deviations

   Correct choice

   absolute deviations

Explanation