Let Z∼N(0,1) and P(Z>k)=0.5-a P(|Z|>k)=2a. P(|Z|>k)=2(0.5-a). P(|Z|>k)=2-2a. Which of the following is true?
1) P(Z>k)=0.5-a
2) P(|Z|>k)=2a
3) P(|Z|>k)=2(0.5-a)
4) P(|Z|>k)=2-2a