distribution
90–99: 02
80–89: 21
70–79: 14
60–69: 07
50–59: 02
30–39: 01
10–19: 01
descriptive statistics
arithmetic mean: 75.3333333333333
median: 79
standard deviation: 14.6901810213393
variance: 215.801418439717
kurtosis: 8.17038367603997
skewness: -2.44043678222986
range: 83
minimum: 10
maximum: 93
sample number: 48