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It is a measure of the spread of a set of observations around their mean value.

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Q: What you understand about standard deviation?
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Is it possible that in standard normal distribution standard deviation known and mean unknown?

it is possible to distribute standard deviation and mean but you dont have to understand how the mouse runs up the clock hicorky dickory dock.


What are the assumptions of standard deviation?

The standard deviation is the standard deviation! Its calculation requires no assumption.


What does the sample standard deviation best estimate?

The standard deviation of the population. the standard deviation of the population.


What is standard deviation of 155.45?

The standard deviation is 0.


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Information is not sufficient to find mean deviation and standard deviation.


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Standard deviation is the square root of the variance.


What is the standard deviation of a standard normal distribution?

The standard deviation in a standard normal distribution is 1.


What is the difference between standard error of mean and standard deviation of means?

Standard error of the mean (SEM) and standard deviation of the mean is the same thing. However, standard deviation is not the same as the SEM. To obtain SEM from the standard deviation, divide the standard deviation by the square root of the sample size.


Why do we need the standard deviation?

The standard deviation is a measure of the spread of data.


What is the standard deviation of 9?

You need more than one number to calculate a standard deviation, so 9 does not have a standard deviation.


Difference Standard Deviation of a portfolio?

difference standard deviation of portfolio


What is the symbol for standard deviation?

The symbol for standard deviation is sigma , σ.