28. The heights of boys in a grade 10 class are normally distributed with a mean of 168 cm and a standard deviation of 2.5 cm. In which range do 95% of the heights approximately fall?

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ا
28.
The heights of boys in a grade 10 class
are normally distributed with a mean of
168 cm and a standard deviation of 2.5
cm.
In which range do 95% of the heights
approximately fall?
A
B.
C.
D.
يعتبر توزيع أطوال الطلاب في الصف 10
توزيعاً معيارياً، بمتوسط مقداره 168 سم
وانحراف معياري 2.5 سم.
ماهو المدى الذي تقع فيه 95% من الأطوال
تقريباً؟
163 - 173 cm
160.5 - 168 cm
160.5 - 175.5 cm
163 - 175.5 cm
Transcribed Image Text:ا 28. The heights of boys in a grade 10 class are normally distributed with a mean of 168 cm and a standard deviation of 2.5 cm. In which range do 95% of the heights approximately fall? A B. C. D. يعتبر توزيع أطوال الطلاب في الصف 10 توزيعاً معيارياً، بمتوسط مقداره 168 سم وانحراف معياري 2.5 سم. ماهو المدى الذي تقع فيه 95% من الأطوال تقريباً؟ 163 - 173 cm 160.5 - 168 cm 160.5 - 175.5 cm 163 - 175.5 cm
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