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 How would you interpret the following post hoc table below. Please use complete sentences and interpret the pvalues. Pairwise Comparisons De -endent Variable: ANXIETY Mean 95% Condence Interval for Difference Differences - Sid. Error '_ Lower Bound U - . er Bound -13.219* . 23334 -25.592' . 35.330 13.21 9" . 2 .304 -12.373* . 22.219 25.592\" . 15.355 12.373\" . 252? Based on estimated marginal means *. The mean difference is signicant at the .05 level. a Adjustment for multiple comparisons: Bonfsrroni