For the data set shown here which of these statements is/are true?
A . Hypothesis Testing of Means or Medians cannot be done since there are an unequal number of observations for the 3 samples
B . A Paired T-test would be applicable for comparing Grade B and Grade A since they follow each other in the data set
C . Grade A has the lowest sample Mean of the 3 samples
D . Grade A has a higher sample Mean than Grade B