Two separate classes of 6 and 8 were taught the same subject using different pedagogies. The final marks of the students were as follows:

No assumptions about the normality of the data were made. Is there any significant difference in the median grade between the two pedagogies? Test at a 0.05 level of significance.

Class A 70 90 82 64 86 77 Class B 86 78 90 82 65 87 80 88