Spot the one that does not fit

Exercise and reference answers

Questions

1. Items

   1. Mean
   2. Range
   3. Mean deviation
   4. Standard deviation

   Odd item

   Mean

2. Items

   1. Quick
   2. Uses extremes
   3. Rough idea
   4. Uses every value

   Odd item

   Uses every value

3. Items

   1. Mean deviation
   2. Standard deviation
   3. Same units
   4. Unit free

   Odd item

   Unit free

4. Items

   1. Sum to zero
   2. Mixed signs
   3. About the mean
   4. Always positive

   Odd item

   Always positive

Instructions

Tap the item that does not belong with the rest.

Explanation