SOLUTION: Find the z-score location of a vertical line that separates a normal distribution as described in each of the following. a. 5% in the tail on the left b. 30% in the tail on the

Algebra ->  Probability-and-statistics -> SOLUTION: Find the z-score location of a vertical line that separates a normal distribution as described in each of the following. a. 5% in the tail on the left b. 30% in the tail on the       Log On


   

Question 1196751: Find the z-score location of a vertical line that separates a normal distribution as described in each of the
following.
a. 5% in the tail on the left
b. 30% in the tail on the right
c. 65% in the body on the left
d. 80% in the body on the right
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

Find the z-score:  Note z-scores represent area to the left of z 
Note Normal Curve: µ = 0 and σ = 1
Using TI or similarly an inexpensive calculator like an Casio fx-115 ES plus
a. 5% in the tail on the left     invNorm(.05, 0, 1) = -1.645
b. 30% in the tail on the right   invNorm(.70, 0, 1) = .524
c. 65% in the body on the left    invNorm(.65, 0, 1) = .385
d. 80% in the body on the right   invNorm(.20, 0, 1) = - 0.842
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