Which of the following studies is best for showing that the first ...

[futuristic]

Which of the following studies is best for showing that the first variable causes changes in the second variable?
 
  a. A researcher asks people who are entering the grocery store how hungry they are and then asks them how much they spent on food as they leave the store.
  b. A researcher assigns participants to sleep various amounts of hours and then observes how cranky they are.
  c. A researcher asks participants how well they like to think and how many books they have read in the last 6 months.
  d. A researcher asks participants how many hours per week they listened to Beethoven while growing up and then gives them a math ability test.

Question 2

In an experiment, the researcher _____, in a correlational study, the researcher _____.
 
  a. measures two variables; measures a single variable known as the dependent variable
  b. measures two variables; measures a single variable known as the independent variable
  c. actively tries to make a relationship; observes to see if a relationship exists.
  d. observes to see if a relationship exists; actively tries to make a relationship

[alexisweber49]

Answer to Question 1

B

Answer to Question 2

C