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Earn +20 ptsQ: What are the z score boundaries for the middle 60 percent of the distribution?
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What are the z score boundaries for the middle of 50 percent of the distribution?
It is -0.6745 to 0.6745
For a normal distribution what z-score value separates the lowest 10 percent of the scores from the rest of the distribution?
-1.28
What z score separates the lowest 40 percent from the rest of the distribution?
-.25
In a standard normal distribution about percent of the scores fall above a z score of 300?
A Z score of 300 is an extremely large number as the z scores very rarely fall above 4 or below -4. About 0 percent of the scores fall above a z score of 300.
In a distribution with a standard deviation of eight an individual score of 42 corresponds to a Z score of -0.5. What is the mean of this distribution?
The mean is 46.
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