По оценкам оператора сотовой связи средняя длительность
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According to the mobile operator the average duration of daily calls of 24 minutes per user. A sample survey of 100 customers showed that the average daily duration of the call is 30 minutes. At the level of α = 0,05 vote statistically significant difference sample survey, it is known that the standard deviation of duration of calls in the general population is 3 minutes.
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- Content type File
- Content description 13,4 kB
- Updated on the site 09.09.2013
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По оценкам оператора сотовой связи средняя длительность
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Sold 12
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