Complete the method rules

Exercise and reference answers

Missing parts

1. Answer

   causation

   Choices

   1. causation
   2. direction
   3. strength

2. Answer

   confounding

   Choices

   1. confounding
   2. dependent
   3. independent

3. Answer

   double-blind

   Choices

   1. double-blind
   2. single-blind
   3. open-label

Complete the statement

Correlation does not show {0}; a third factor doing the work is a {1} variable; and neither side knowing the groups makes a study {2}.

Instructions

Tap a word for each blank to complete the rules.

Explanation