SOLUTION: Find the following probabilities for standard normal random variable of z for problems a-d I spent an hour working with this problem and struggled to get the right answers. a) P(z

Question 758786: Find the following probabilities for standard normal random variable of z for problems a-d I spent an hour working with this problem and struggled to get the right answers.
a) P(z>1.70)
b) P(z<-1.38)
c) P(0.21≤z≤2.52)
d) P(-2.59
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Find the following probabilities for standard normal random variable of z for problems a-d I spent an hour working with this problem and struggled to get the right answers.
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Are you using a z-table that you don't understand.
These problems should not be that difficult.
I used my TI-84 calculator to get the following answers:
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a) P(z>1.70) = normalcdf(1.70,100) = 0.0446
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b) P(z<-1.38)= normalcdf(-100,-1.38) = 0.0838
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c) P(0.21≤z≤2.52) = normalcdf(0.21,2.52) = 0.4110
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d) P(-2.59
Something is missing "d".
Cheers,
Stan H.
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