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Q: How is mean absolute deviation used in life?
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Continue Learning about Statistics

Coefficient of Deviation?

Coefficient of deviation (CV) is a term used in statistics. It is defined as the ratio of the standard deviation (sigma) to the mean (mu). The formula for CV is CV=sigma/mu.


Why is the sample standard deviation used to derive the standard error of the mean?

the sample mean is used to derive the significance level.


The t distribution is used to construct confidence intervals for the population mean when the population standard deviation is unknown?

It can be.


How do you calculate mean median and standard deviation?

The mean is the sum of each sample divided by the number of samples.The median is the middle sample in a ranked list of samples, or the mean of the middle two samples if the number of samples is even.The standard deviation is the square root of the sum of the squares of the difference between the mean and each of the samples, such sum then divided by either N or by N-1, before the square root is taken. N is used for population standard deviation, where the mean is known independently of the calculation of the standard deviation. N-1 is used for sample standard deviation, where the mean is calculated along with the standard deviation, and the "-1" compensates for the loss of a "degree of freedom" that such a procedure entails.Not asked, but answered for completeness sake, the mode is the most probable value, and does not necessarily represent the mean such as in an asymmetrically skewed distribution, such as a Poisson distribution.


What is the statistic that is used to estimate a population standard deviation?

the sample standard deviation