A music teacher had noticed that some students went to pieces during exams. He wanted to test whether this performance anxiety was different for people playing different instruments. He took groups of guitarists, drummers and pianists (variable = 'Instru') and measured their anxiety (variable = 'Anxiety') during the exam. He also noted the type of exam they were performing (in the UK, musical instrument exams are known as 'grades' and range from 1 to 8). He wanted to see whether the type of instrument played affected performance anxiety when accounting for the grade of the exam.
-The first part of the SPSS output is below. What does this part of the output tell us?
A)The grade of exam taken did not have a significant effect on anxiety.
B)The variances of anxiety scores were different in the different groups of musicians.
C)The variances of anxiety scores were roughly the same in the different groups of musicians.
D)The type of instrument played did not have a significant effect on anxiety.

Question

A music teacher had noticed that some students went to pieces during exams. He wanted to test whether this performance anxiety was different for people playing different instruments. He took groups of guitarists, drummers and pianists  (variable = 'Instru') and measured their anxiety (variable = 'Anxiety') during the exam. He also noted the type of exam they were performing (in the UK, musical instrument exams are known as 'grades' and range from 1 to 8). He wanted to see whether the type of instrument played affected performance anxiety when accounting for the grade of the exam. 
-The first part of the SPSS output is below. What does this part of the output tell us? 
A)The grade of exam taken did not have a significant effect on anxiety. 
B)The variances of anxiety scores were different in the different groups of musicians. 
C)The variances of anxiety scores were roughly the same in the different groups of musicians. 
D)The type of instrument played did not have a significant effect on anxiety.

Quizplus · Accepted Answer

The part of the output shows the Levene's test for equality of variances, which tests whether the variances of anxiety scores are the same across the different groups of musicians. The p-value for the test is 0.216, which is greater than the alpha level of 0.05, indicating that there is no significant difference in variances between the groups. Therefore, we can assume that the assumption of equal variances is met for further statistical analyses, such as ANOVA. The test does not provide information on the effects of exam grades or instrument types on anxiety scores.

A Music Teacher Had Noticed That Some Students Went to Pieces