SOLUTION: A vertical line is drawn through a normal distribution at z = -1.00. How much of the distribution is located between the line and the mean? What z-score separates the lowest

Algebra ->  Probability-and-statistics -> SOLUTION: A vertical line is drawn through a normal distribution at z = -1.00. How much of the distribution is located between the line and the mean? What z-score separates the lowest      Log On


   

Question 1067711: A vertical line is drawn through a normal distribution at z = -1.00. How much of the distribution is located between the line and the mean?


What z-score separates the lowest 10% of the distribution from the rest?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A vertical line is drawn through a normal distribution at z = -1.00. How much of the distribution is located between the line and the mean?
That area is the same as the area between z = 0 and z = +1.
Use your z-chart and you will see that area is approximately 34%
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What z-score separates the lowest 10% of the distribution from the rest?
That value is the same as the z-score that has 40% of the area under
the curve between the mean and that z-score.
Use your z-chart to find the z-score corresponding to 0.4000
Or use your TI-84+ to get the following answer::
Ans: invNorm(0.9) = 1.2816
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Cheers,
Stan H.
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