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It is -0.6745 to 0.6745

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Q: What are the z score boundaries for the middle of 50 percent of the distribution?
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What are the z score boundaries for the middle 60 percent of the distribution?

The boundaries are ± 0.8416


What are the z-score boundaries for the middle of 50 percent of the distribution?

50 * * * * * z = -0.67449 to z = +0.67449


What z score values form the boundaries for the middle 60 percent of a normal distribution?

z = - 0.8416 to z = + 0.8416


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


What z-score value separates the highest 40 percent of the scores from the rest of the distribution?

0.2533


In a standard normal distribution about percent of the scores fall above a z-score of 3.00?

0.13


The standard z-score such that 80 percent of the distribution is below to the left of this value is?

z = 0.8416


What is the probability that a data value in a normal distribution is between a z-score of -1.98 and a z-score of 1.11 Round your answer to the nearest tenth of a percent?

It is 84.3%


Find the z-score for which 92 percent of the distribution's area lies between -z and z?

z = 1.75


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.


What z-score for the upper 50 percent of area under the normal curve?

A Z-Score of 0 separates the upper 50% of the area from the lower 50% of the area. A Z-Score of 0 is at the mean, median, and mode of the distribution.