Hemoglobin is a protein that transports both O2 and CO2 because Bus 220 students often appear semi-comatose in class it is thought that their HGB level may be reduced by the topics presented in this course test the research assertion that the mean HGB level MAT 210 students is higher than that of Bus 220 students use the data shown below

n Xbar Standard deviation

Bus 220 50 11.6 4.2

Mat 220 40 13.7 2.9 a = .004