Office of Institutional Research (OIR) decides to determine if the proportion of self-reported

minority students enrolled in NVCC's MTH 245 classes this semester is different from the proportion enrolled in MTH 264. The variables class and mstatus record class and minority status from a randomly chosen selection of 100 students.

a) needs a contingency table to summarize the data. Which group has a higher proportion of minority students?

b) needs a confidence interval for the difference between the proportions of MTH 245 and MTH 264 students who self-report minority status. Does your confidence interval suggest the difference is statistically significant?