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Знайти вибіркову дисперсію вибірки, яка задана статистичним рядом
(xi)
|
10,5
|
11
|
11,5
|
12
|
12,5
|
13
|
13,5
|
(mi)
|
2
|
18
|
40
|
25
|
6
|
5
|
4
|
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