يلا نزآآآكـــر الإحصآإء سسوآإآإ ..

[نبض الابتسامة]

بنات سؤال

شوفوا اللسؤال الثاني اللي بالاحمر

XAMPLE 2:
The mean of marks in test A is 80 and the standard deviation is 5,
if student get 70 in this test.
His relative position (z-score) in this exam is:
A) 6 B) 36 C)-3 D) -2



If the student in question (EXAMPLE 2) has a z-score = -1 in test B, one can say about his relative position that:
A- B better is better than A
B- information are not sufficient
C- Test (A) better than test (B)
D- Test (A) is similar to test (B)

كيف راح اعرف ؟؟