SOLUTION: The z-score that cuts off the upper 5% of the distribution is_________ a) 1.96 b) 1.28 c) 1.645 d) 2.33

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Question 1117334: The z-score that cuts off the upper 5% of the distribution is_________
a) 1.96

b) 1.28

c) 1.645

d) 2.33
Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
1.645 is your answer.

you can use the z-score table to find it, or you can use a z-score calculator.

the one i used is at http://users.stat.ufl.edu/~athienit/Tables/Ztable.pdf

per the table, look for an area of .95 to the left of the z-score.

that would leave .05 to the right.

the z-score table will not be right on .95.

it will show you an area of .9495 and .9505.

.9495 corresponds to a z-score of 1.64
.9505 corresponds to a z-score of 1.65

.05 is in between at 1.645.

if you used a z-score calculator, it would tell you that the z-score is 1.644853626.

round that to 3 decimal places and you get 1.645.