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Stack and Queues base score stats:
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min:     19.00
max:     100.00
mean:    74.85
median:  81.00
modes:   [67.00;86.00;89.00]
std_dev: 20.83
Histogram:
 95.0-100.0 : *****
 90.0- 95.0 : *******
 85.0- 90.0 : ********
 80.0- 85.0 : *****
 75.0- 80.0 : ***
 70.0- 75.0 : ******
 65.0- 70.0 : ****
 60.0- 65.0 : *
 55.0- 60.0 : 
 50.0- 55.0 : *
 45.0- 50.0 : *
 40.0- 45.0 : **
 35.0- 40.0 : *
 30.0- 35.0 : 
 25.0- 30.0 : 
 20.0- 25.0 : **
 15.0- 20.0 : *
 10.0- 15.0 : 
  5.0- 10.0 : 
  0.0-  5.0 : 
counting 47 out of 54 students