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.
Using the data from this Megastat printout, you determine:

A) The letter grades are evenly distributed when tested at the 0.05 level of significance
B) The letter grades are not normally distributed when tested at the 0.01 level of significance
C) The letter grades are normally distributed when tested at the 0.05 level of significance
D) The letter grades are not normally distributed when tested at the 0.05 level of significance
E) B & D are true