Which of the following statements are true if 2: is the standard normal variable? Hint: Sketch a normal curve. Select four (4) true statements from the list below: - P(-1.5 :1 .2: <_z is twice p g z lf. b then a cannot be positive. :1 smallerthan :3 smaller than the standard normal distribution has mean of and variance w m l7 if means two perfectly distributions are equal their medians could different. c zscore corresponding to percentile negative. lfo> 0, then P(z g a.)