Answer:
Timed test.
Step-by-step explanation:
An operational definition gives exactly what the independent variable means and its mode of measurement. The Independent variable is the variable in a research or experimental study which causes a change in the the measured variable. Hence, the independent variable is the predictor variable. In the study above, the independent variable is the timed test which is used to observe changes in the heart rate of the test taker (test anxiety). The change innheartrate of the test taker is the dependent variable.
Answer:
Whats the Question?
Step-by-step explanation:
The error occurs in step 3. By the product rule, we have
(i.e. there is a missing factor of 
)
Then
Is b) Step-by-step explanation:
Answer:
Square is the correct answer
