سؤال بآيخ < ‘

[2NMD]

18. When a distribution is bell-shaped, approximately what percentage of data values will
fall within 1 standard deviation of the mean?
A) 50% B) 68% C) 95% D) 99.7%

الجواب 68%

شوفو ص 136

فيه ثلاث نسب ( حفظ )
68% > 1
%95 > 2
99.7% > 3