So today is a great day for my notes to go missing and for me to want to give up, I was going through my notes and I couldn't find anything similar to what was shown in these questions, I want to get...

So today is a great day for my notes to go missing and for me to want to give up, I was going through my notes and I couldn't find anything similar to what was shown in these questions, I want to get a good grade on this, please help

Extracted text: QUESTION 20 Which of the following are generally accepted as the most powerful scientific research tool? a. case studies O b. surveys c. correlational studies d. experiments


Extracted text: QUESTION 23 In a carefully controlled experiment, the only possible cause for any effect noted in the dependent variable is the a. extraneous variable. b. random selection. c. independent variable. d. random assignment.