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Q: What percentage of scores falls between the mean and -2 to 2 standard deviations under the normal curve?
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What percentage of observations of a normal distribution is reprented by the mean plus or minus 1.96 standard deviations?

The probability of the mean plus or minus 1.96 standard deviations is 0. The probability that a continuous distribution takes any particular value is always zero. The probability between the mean plus or minus 1.96 standard deviations is 0.95


What percentage of observations of a normal distribution is represented by the mean plus or minus 1.96 standard deviations?

95%


What is -1.33 standard deviations in percentage?

Assuming a normal distribution, Pr { X < -1.33 } ~= 0.091759135650280765 or about 9.18 %


What percentage of observations of a normal distribution is represented by the mean plus or minus 2 standard deviations?

about 68%


What percentage of scores fall within -3 and plus 3 standard deviations around the mean in a normal distribution?

99.7% of scores fall within -3 and plus 3 standard deviations around the mean in a normal distribution.


What percentage of a normal distribution is within 2 standard deviations of the mean?

I believe the standard deviations are measured from the median, not the mean.1 Standard Deviation is 34% each side of median, so that is 68% total.2 Standard Deviations is 48% each side of median, so that is 96% total.


Statistic question help?

When using Chebyshev's Theorem the minimum percentage of sample observations that will fall within two standard deviations of the mean will be __________ the percentage within two standard deviations if a normal distribution is assumed Empirical Rule smaller than greater than the same as


In a standard normal distribution 95 percent of the data is within plus standard deviations of the mean?

95% is within 2 standard deviations of the mean.


What does normality mean in health and social care?

All minor deviations occurring with two standard deviations under the Gaussian curve are considered normal. Deviations occurring outside of two standard deviations are considered abnormal.


How many standard deviations are 95 percent of measurements away from the mean?

95 percent of measurements are less than 2 standard deviations away from the mean, assuming a normal distribution.


If a data point has a corresponding score of -1.5 then it is one and a half standard deviations above the mean value.?

If you are talking about the z-value of a point on the normal curve, then no, it is 1.5 standard deviations BELOW the mean.


How many standard deviations is the first quartile away from the mean on a Normal distribution?

0.674 sd.