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80 percent percent = 0.008. The two tailed z-score for 0.008 is 2.652

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11y ago

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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 z score for a given raw score?

Let your raw score be x and M the mean and S the standard deviation. The Z score for your specific x is Z=(x-M)/S So say your score is 80 (out of 100) and the mean is 70 and the standard deviation is 10. Then the z score for your 80 is: (80-70)/10=1 If on the other hand you got a 60, then the z score would be -1.


What is the Z value for 91 percent confidence interval estimation?

The Z-value for a one-sided 91% confidence interval is 1.34


What is the critical z-value that corresponds to a confidence level of 86 percent?

norminv([(1-0.86)/2 1 - (1-0.86)/2], 0, 1) which results in a z-score range of -1.4758 to 1.4758


What is the Z score for a confidence level of 0.01?

The answer depends on whether the confidence interval is one sided or two sided.


What is the z score if 30.5 percent of the curve lies to the left of the z?

It is -0.51


What is the z score if 65 percent of the curve lies to the right of z?

-0.38532


What z score corresponds to 40 percent between the mean and the z?

z = 1.28, approx.


What is the z value for 86 percent confidence interval estimation?

Pr{z<=1.0805}~=0.86


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

z = 1.75


What is the z score if 30 percent of the curve lies to the left of the z?

The z-score is 0.84. In the related link, look in the body of the table for .3 area (.2995 closest) and it yields the .84 z-score.


What Z score corresponds to 17 percent of the data between the mean and the Z?

z value=0.44