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Earn +20 ptsQ: The sum of deviations of the individual data elements from their mean is?
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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 is the sum of the deviations from the mean?
The sum of standard deviations from the mean is the error.
How much data is within 1.28 standard deviations of mean on bell shaped curve?
80%
Which measure of central location will the sum of the deviations of each value from the data's average always be zero?
the mean
What is the Standard deviation of a set of data in which all the data values are the same?
ZeroDetails:The "Standard Deviation" for ungrouped data can be calculated in the following steps:all the deviations (differences) from the arithmetic mean of the set of numbers are squared;the arithmetic mean of these squares is then calculated;the square root of the mean is the standard deviationAccordingly,The arithmetic mean of set of data of equal values is the value.All the deviations will be zero and their squares will be zerosThe mean of squares is zeroThe square root of zero is zero which equals the standard deion
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