Statistics Help
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
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
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