SOLUTION: Height is normally distributed with a mean of 68 inches and a standard deviation of 5 inches. 6.What is the probability of selecting someone who is 70 inches or taller? I got .

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Question 1168095: Height is normally distributed with a mean of 68 inches and a standard deviation of 5 inches.
6.What is the probability of selecting someone who is 70 inches or taller?
I got .21186 am i correct?

7.What is the probability of selecting someone who is 64 inches or shorter?
I got z=0.40 but I am stuck on what to do next?

8.What is the probability of selecting someone who is 68 inches or taller?
I got z= .0000 but I am stuck on what to do next?
Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website!
z=(x-mean)/sd
>(70-68)/5=2/5
probability z>(2/5) or 0.4 is 0.3446
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fewer than 64 inches is a z=(64-68)/5 or -4/5 or -0.8
that probability is 0.2119, what you got for 6. It belongs here.
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z=0. The probability z>0 is 50%
The probability z <0 is 50%
The probability z=0 is 0.