رد: يلا نزآآآكـــر الإحصآإء سسوآإآإ ..
6. When a distribution is bell-shaped, approximately what percentage of data values will fall within 1
standard deviation of the mean??
A) 99.7%
B) 95%
C) 50%
D) 68%
ايش الجواااااااااااب؟؟؟ :(:(:(:(:(:(:(:(:(:(:(:(
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