Answer:
Step-by-step explanation:
THe probability that Z is greater than -2.575 is the area
to the right of -2.575 in the std normal curve.
We have std normal distribution has 0.5 area exactly to the right of the mean.
The area to the left of -2.575 in the std normal table is
1-0.4990= 0.0010
Hence required probability
= P(Z>-2.575) = 1-P(Z<-2.575)
= 1-0.0010
=0.9990
