The average UQ student reports dedicating 8.5 hours per week to each 2-unit course.What is the approximatetobtained value for a group of 20 psychology students who study for a mean of 10 hours per week for each 2-unit course, where the estimated population variance is 9.Would this sample be considered significantly different from the population, applying an alpha level of 0.05?

a. t= 2.24; the sample would be considered statistically significant

b. t= 0.67; the sample would NOT be considered statistically significant

c. t= 0.67; the sample would be considered statistically significant

d. t= 2.24; the sample would NOT be considered statistically significant