A standard normal variable ZZZ satisfies P(Z>z0)=0.05P(Z > z_0) = 0.05P(Z>z0)=0.05. What is true about z0z_0z0?
z0=1.96z_0 = 1.96z0=1.96
z0=1.645z_0 = 1.645z0=1.645
z0=2.58z_0 = 2.58z0=2.58
z0=1.28z_0 = 1.28z0=1.28