Question: Using the standard normal distribution table, find the z -scores which statisfies each of the following conditions.

a) The area under the standard normal curve to its left is 0.5. z=

b) The area under the standard normal curve to its left is 0.9826. z=

c) The area under the standard normal curve to its right is 0.1423. z=

d) The area under the standard normal curve to its right is 0.9394. z=  Edit

Answer: a. z=0(Ans.)

b. P(z<2.11)=0.9826=0.5+0.4826
z=2.11(Ans.)

c.
0.5-0.1423=0.3577
P(0 P(z>1.07)=0.1423
z=1.07(Ans.)

d. 0.9394-0.5=0.4394

P(0
P(z>-1.55)=0.5+0.4394=0.9394
z=-1.55(Ans.)  Edit