In order to study the quality of parts, a batch of 100 parts was
checked at the enterprise. The results are presented in the
following table:
Groups of parts by weight, g
40-50
50-60
60-70
70-80
80-90
90-100
100-110
110-120
Total
Number of parts
2
4
11
19
21
25
10
8
100
Determine the mean, variance, mode, median, 1st and 3rd
quartiles, coefficient of variation, plot a histogram, find
asymmetry and kurtosis. Calculated indicators indicate in the
figure.