يلا نذاكر أحصاء سوآ ..

[Dr.LOODA]

ممكن احد يساعدني في هذه الاسئلة . . .
(1)

If P(a<z<b)=0.95, then the value of the standard deviations equals
A) 2
B) 3
C) 0.05
D) 1


(2)

A correlation coefficient of 0.96 would mean that
A) the values of x decrease as the values of y increase.
B) the values of x increase as the values of y decrease.
C) there is no relationship between x and y.
D) the values of x increase as the values of y increase.