A normal curve table tells you that the probability lying below z= -1 is .1587. This can be interpreted as:

A. A random selection from the population has a 15.87% chance of being at or below z= -1
B. 15.87% of the area under the curve lies below z= -1
C. A random selection from the population has a 15.87% chance of being below z= -1.
D. 15.87% of the area under the curve lies at or below z= -1
E. All of the above

Question

A normal curve table tells you that the probability lying below z= -1 is .1587. This can be interpreted as: 

A. A random selection from the population has a 15.87% chance of being at or below z= -1
B. 15.87% of the area under the curve lies below z= -1 
C. A random selection from the population has a 15.87% chance of being below z= -1. 
D. 15.87% of the area under the curve lies at or below z= -1 
E. All of the above

michele_laino · Answer

by definition of the gaussian curve, I think that the answer are the options A and D