A Student Asked a Statistics Professor If Grades Were Marked

Multiple Choice

A student asked a statistics professor if grades were marked "on the curve." The professor decided to give the student a project to determine if last year's statistics grades were normally distributed. The professor told the student that last year's mean mark was 70 with a standard deviation of 10 and to use the following results. What is the calculated value of chi-square?

A) 29.76
B) 14.20
C) 14.88
D) 28.39
E) 12.59