What are the roles of measure of dispersion in descriptive statistics? Following table gives the frequency distribution of thickness of computer chips (in nanometer) manufactured by two companies.
Thickness of computer chips | 5 | 10 | 15 | 20 | 25 | 30 | |
Number of chips | Company A | 10 | 15 | 24 | 20 | 18 | 13 |
company B | 12 | 18 | 20 | 22 | 24 | 4 |
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