In: Statistics and Probability
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.