no. A professor in the psychology department would like to determine whether there has been a significant change in grading practices over the years. It is known that the overall grade distribution for the department in 1985 had 14% As, 26% Bs, 31% Cs, 19% Ds, and 10% Fs. A sample of psychology students from last semester produced the following grade distribution: A B C D 30 62 64 32 12 Answers For a test with an alpha level of 0.05, what is the critical value? What are the expected frequencies? What is the value for the chi-square? Using an alpha level of 0.05, do the data indicate a significant change in the grade distribution