Question

A researcher records how many hours subjects sleep and then records the time it takes these subjects to complete an agility test administered at 9 am each day. The independent variable is A. level of difficulty of the agility test B. amount of sleep OC. age of the subject D. score on the agility test

Answer 1

step 1

an independent variable is the cause while a dependent variable is the effect in a causal research study.

Step 2

The independent variable is amount of sleep

Final answer

amount of sleep