رد: سؤال بآيخ < ‘
طبعا المقصود من 1 و 2 و 3
68% = (mean - 1 standard deviation , mean + 1 standard deviation )
95% = ( mean - 2 standard deviation , mean + 2 standard deviation )
99.7% = ( mean - 3 standard deviation , mean + 3 standard deviation )
ان شاءالله وصلت الفكره
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