the probability that Z is greater than zero is
a. 0.5
b. equal to 1
c. at least 0.5
d. 1.96
a. 0.5
b. equal to 1
c. at least 0.5
d. 1.96
-
C. At least 0.5
-
The 0 is in the middle of the curve so it divides the area under the curve equally.
P(z>0)=0.5
P(z>0)=0.5