Consider three students with the following distributions of 24 quiz scores:

Amanda:
8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8-

Barney:  5, 6,6,6,6,7,7,7,7,7,7,7,8,8,8,8,8,8,8,9,9,9,9,10

 
Charlene:  0,0,0,0,0,0,0,0,0,0,0,0,10,10,1010,10,10,10,10,10,10,10,10

Answer the following without bothering to do any calculations.  Explain your choices. 

a) Which student has the smallest standard  deviation of quiz scores? 

b) Which student has the largest standard  deviation of quiz scores?