Note the difference between these questions and answer accordingly:

Elmo likes music. He wondered if listening to music while studying will improve scores on an exam. Fifty students who were to take the midterm in a week agreed to be part of a study. Half were randomly assigned to listen to classical music while studying for the exam. The other half were told not to leten to any music while studying for the exam Ahypnthesis test is is he performed to determine if the average score of those listening to music while studying for the exam was higher than for those who did not listen to any music while studying for the exam. Let X be the midterm scores ufthose who listened to classical music while studying, and Y be the midterm scores of those who did not listen to any music while studying. Which of the following is the correct alternative hypothesis? Choose the correct answer below. 0* llx'l'Y'O OB. px>0andw>0 05- PX=PY 05- llx'l'v OE. i-ir=n Elmo likes music. He wondered if listening to music while studying will improve scores Previous Question nts who were to take the midterm in a week agreed to be part of a study. Half were randomly assigned to listen to classical music while studying for the exam. The other half were told not to listen to any music while studying for the exam. A hypothesis test is to be performed to determine if the average score of those listening to music while studying for the exam was higher than for those who did not listen to any music while studying for the exam. Let X be the midterm scores of those who listened to classical music while studying, and Y be the midterm scores of those who did not listen to any music while studying. Which of the following is the correct null hypothesis? Choose the correct answer below. O A. Ho: HX = HY O B. Ho: Hy = 0 and Hy = 0 O C. Ho: Hx > HY OD. Ho: X - Y= 0