###### Asked in Statistics

Statistics

# Is the Symbol for the population standard deviation?

## Answer

###### Wiki User

###### June 24, 2017 6:30PM

A lower case s is the symbol.

## Related Questions

###### Asked in Math and Arithmetic, Statistics

### Is standard deviation same as standard error?

From what ive gathered standard error is how relative to the
population some data is, such as how relative an answer is to men
or to women. The lower the standard error the more meaningful to
the population the data is.
Standard deviation is how different sets of data vary between
each other, sort of like the mean.
* * * * *
Not true!
Standard deviation is a property of the whole population or
distribution. Standard error applies to a sample taken from the
population and is an estimate for the standard deviation.

###### Asked in Statistics

### Why use the T score?

###### Asked in Statistics

### Variance and standard deviation are one and the same thing?

No. But they are related. If a sample of size n is taken, a
standard deviation can be calculated. This is usually denoted as
"s" however some textbooks will use the symbol, sigma. The standard
deviation of a sample is usually used to estimate the standard
deviation of the population. In this case, we use n-1 in the
denomimator of the equation. The variance of the sample is the
square of the sample's standard deviation. In many textbooks it is
denoted as s2. In denoting the standard deviation and variance of
populations, the symbols sigma and sigma2 should be used. One last
note. We use standard deviations in describing uncertainty as it's
easier to understand. If our measurements are in days, then the
standard deviation will also be in days. The variance will be in
units of days2.

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