CS280 Prelim I

       (rough)
 score  %tile
 -----  -----
    90   ~ 99
    89   ~ 99
    88   ~ 98
    86   ~ 97
    85   ~ 95
    84   ~ 94
    83   ~ 91

    82   ~ 88
    81   ~ 83
    80   ~ 80

    79   ~ 79
    78   ~ 77
    77   ~ 74
    76   ~ 71

    75   ~ 64
    74   ~ 61

    73   ~ 55
    72   ~ 54
    71   ~ 51

    70   ~ 47
    69   ~ 47
    68   ~ 46
    67   ~ 42
    66   ~ 42
    65   ~ 40

    64   ~ 36
    63   ~ 34
    62   ~ 33
    61   ~ 31
    60   ~ 30

    59   ~ 27
    58   ~ 25
    57   ~ 23
    56   ~ 22
    55   ~ 21
    54   ~ 20

    53   ~ 19
    52   ~ 18
    51   ~ 17
    50   ~ 15
    49   ~ 14
    47   ~ 13
    46   ~ 11
    45   ~ 10

    44   ~  9
    43   ~  8
    42   ~  7
    37   ~  6
    36   ~  6
    34   ~  5
    33   ~  4
    32   ~  3
    29   ~  2
    21   ~  1
    19   ~  1
    17   ~  0

[semantics:  "score = 65 and (rough) %tile = 40" means
"approximately 40% of the class scored below 65."]