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 theoverall 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.
| Music Majors | Nonmusic Majors |
Sample size Mean “overall” rating Standard deviation | 100 4.26 .81 | 100 4.59 .78 |
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