A researcher is interested in the pleasure that people obtain from listening to music whilst varying both the volume and the tempo (speed) of the music. 12 participants and randomly allocated into two groups. The different groups listen to the music at different volumes, i.e. soft and loud. The two groups of participants were given three pieces of classical music to listen to. Each piece of music was slow, medium, or fast. Participants were asked to rate how much they enjoyed the music on a 20-point scale where 20 points is highly enjoyable and 1 point is not at all enjoyable.Which of the following statements are true?There are 3 IVs in this study. IV 1 is 'volume' and it is a between subjects variable; IV 2 is 'speed' and it is a within subjects variable. IV 3 is 'music enjoyment' and it is a within subjects variableThere are 2 IVs in this study. IV 1 is 'volume' and it is a within subjects variable; IV 2 is 'speed' and it is a between subjects variableThere are 3 IVs in this study. IV 1 is 'volume' and it is a within subjects variable; IV 2 is 'speed' and it is a between subjects variable. IV 3 is 'music enjoyment' and it is a within subjects variableThere are 2 IVs in this study. IV 1 is 'volume' and it is a between subjects variable; IV 2 is 'speed' and it is a within subjects variable

We wish to test the hypothesis that music improves leaning. We compare test scores of students who study to music with those who study in silence. Which of the following is an extraneous variable in the experiment? A. the amount of time allowed for the studying B. Any of them is an extraneous variable C. the students test scores D. the presence or absence of the music

A study was conducted to explore the possibility of a music treatment effect on someone's ability to estimate time. One version of the study involved 115 university students. Each student was led into a dark room, and asked to press a button exactly three minutes after a signal was given. The time that actually passed from the signal to the pushing of the button was recorded in minutes. The university students were allocated to one of the two groups based on their weight. One group listened to jazz music during the study, while the other group did not. The researchers found a difference of 0.18 minutes between the mean of the times recorded for each group, with the group that listened to jazz music having the higher mean. The tail proportion from a randomisation test carried out with the data from the study was 115/1000. Use the information above to answer the following questions. In some cases, you will need to copy and paste words exactly as they appear above. Who were the participants in this study? student How many participants were used for this study? What was the treatment effect explored? treatment effect What were the units used to measure the response variable? Write the tail proportion as a percentage (rounded to one decimal place e.g. 12.5 or 25.0): 11.5 % Is the observed difference compatible with the null model? (enter yes or no) Is the observed difference unusual when compared to the 'just chance' distribution? (enter yes or no) Was randomisation used in the design of the study? (enter yes or no

We wish to test the hypothesis that music improves learning. We compare the test scores of students who study with music and those who study in silence. Which of the following is an extraneous variable in this experiment?a.the presence or absence of musicb.the amount of time allowed for studyingc.silenced.the students test scores

“To what extent are you satisfied with the frequency of bus and train services?” (1 = Not at all satisfied, 10 = Extremely satisfied”). This item should:Group of answer choicesBe scored on a seven-point scaleUse dichotomous scoringBe converted to two itemsBe scored in accordance with classical test theory

A teacher asked 155 students which type of music they prefer to listen to. Their responses are shown in this table.R&B Jazz ClassicalBoys 45 40 3Girls 40 20 7Based on the table, which statement is true? A. More students prefer jazz music than all other types of music. B. More boys than girls prefer classical music. C. More than half of the students prefer R&B music. D. More than half of the students prefer jazz music.