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Max choice: 'C'
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[M/m] Print mean
[S/s] Print standard deviation
[G/g] Print grade range
[I/i] Print student info in range
[H/h] Draw histogram
[Q/q] Quit
2.98
##

[M/m] Print mean
[S/s] Print standard deviation
[G/g] Print grade range
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[H/h] Draw histogram
[Q/q] Quit
Error. Invalid option.

[M/m] Print mean
[S/s] Print standard deviation
[G/g] Print grade range
[I/i] Print student info in range
[H/h] Draw histogram
[Q/q] Quit
Error. Invalid option.

[M/m] Print mean
[S/s] Print standard deviation
[G/g] Print grade range
[I/i] Print student info in range
[H/h] Draw histogram
[Q/q] Quit
Error. Invalid option.

[M/m] Print mean
[S/s] Print standard deviation
[G/g] Print grade range
[I/i] Print student info in range
[H/h] Draw histogram
[Q/q] Quit
Error. Invalid option.

[M/m] Print mean
[S/s] Print standard deviation
[G/g] Print grade range
[I/i] Print student info in range
[H/h] Draw histogram
[Q/q] Quit
2.60
##

[M/m] Print mean
[S/s] Print standard deviation
[G/g] Print grade range
[I/i] Print student info in range
[H/h] Draw histogram
[Q/q] Quit
[ 0, 1): ----
[ 1, 2): 
[ 2, 3): 
[ 3, 4): ---
[ 4, 5): 
[ 5, 6): --
[ 6, 7): 
[ 7, 8): -
[ 8, 9): 
[ 9,10]: 

##

[M/m] Print mean
[S/s] Print standard deviation
[G/g] Print grade range
[I/i] Print student info in range
[H/h] Draw histogram
[Q/q] Quit
Enter grade range:
1
##

[M/m] Print mean
[S/s] Print standard deviation
[G/g] Print grade range
[I/i] Print student info in range
[H/h] Draw histogram
[Q/q] Quit
Enter index range:
003:   0,   5,   0,  0.00
004:   1,   4,   0,  0.80
005:   2,   2,   1,  3.40
006:   3,   1,   1,  5.70
007:   0,   0,   5,  0.00
008:   2,   1,   2,  3.70

##

[M/m] Print mean
[S/s] Print standard deviation
[G/g] Print grade range
[I/i] Print student info in range
[H/h] Draw histogram
[Q/q] Quit
Enter grade range:
2
##

[M/m] Print mean
[S/s] Print standard deviation
[G/g] Print grade range
[I/i] Print student info in range
[H/h] Draw histogram
[Q/q] Quit
Enter index range:
000:   0,   4,   1,  0.00
001:   3,   2,   0,  5.40
002:   4,   1,   0,  7.70
003:   0,   5,   0,  0.00
004:   1,   4,   0,  0.80
005:   2,   2,   1,  3.40
006:   3,   1,   1,  5.70
007:   0,   0,   5,  0.00
008:   2,   1,   2,  3.70
009:   2,   3,   0,  3.10

##

[M/m] Print mean
[S/s] Print standard deviation
[G/g] Print grade range
[I/i] Print student info in range
[H/h] Draw histogram
[Q/q] Quit
