Rating music teachers. Students enrolled in music classes...

Rating music teachers. Students enrolled in music classes at the University of Texas (Austin) participated in a study to compare the observations and teacher evaluations of music education majors and nonmusic majors ( Journal of Research in Music Education , Winter 1991). Independent random samples of 100 music majors and 100 nonmajors rated the overall performance of their teacher, using a six-point scale, where 1 was the lowest rating and 6 the highest. Use the information in the accompanying table to compare the mean teacher ratings of the two groups of music students with a 95% confidence interval. Interpret the result.

Based on Duke, R. A., and Blackman, M. D. “The relationship between observers’ recorded teacher behavior and evaluation of music instruction.” Journal of Research in Music Education, Vol. 39, No. 4, Winter 1991 ( Table 2 ).