16.2 A psychologist had the idea that different types of music and room temperature would influence performance on simple math tasks.

She had two independent variables measured at the nominal level:

(1) “music type,” hard rock and classical, and (2) “room temperature,”

comfortable and hot. The dependent variable was a series of minimally challenging mathematical problems that were scored on a 0 to 100 scale. She randomly selected 24 students and then once again randomly assigned them to one of four groups. The data that resulted from her experiment are presented in the following table. Your task is to select the correct test, write the null and alternative hypotheses, and then interpret the results. Was there any significance on task performance as a result of music type or room temperature, or did these two variables act together to cause change?