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# How do you find standard deviation in a survey?

Updated: 10/19/2022

Wiki User

11y ago

Suppose you have n observations in your survey. Add all the observations together, to give Sx.

Next square all the observations and add then together and subtract (Sx)2/n.

Divide this number by (n-1) and take the square root.

Wiki User

11y ago

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Q: How do you find standard deviation in a survey?
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Related questions

### If quartile deviation is 24. find mean deviation and standard deviation?

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

### Why we calculate standard deviation and quartile deviation?

we calculate standard deviation to find the avg of the difference of all values from mean.,

### Is variance the square root of standard deviation?

No, you have it backwards, the standard deviation is the square root of the variance, so the variance is the standard deviation squared. Usually you find the variance first, as it is the average sum of squares of the distribution, and then find the standard deviation by squaring it.

### Can a standard deviation of a sample be less than a standard deviation of a population?

Sure it can. But in the survey business, the trick is to select your sample carefully so that they'll be equal, i.e. a sample that is accurately representative of the population.

### How do you find graph median by using standard deviation?

You cannot because the median of a distribution is not related to its standard deviation.

### Why would someone need a standard deviation calculator?

A standard deviation calculator allows the user to find the mean spread away from the mean in a statistical environment. Most users needing to find the standard deviation are in the statistics field. Usually, the data set will be given and must be typed into the calculator. The standard deviation calculator will then give the standard deviation of the data. In order to find the variance of the data, simply square the answer.

### How do i find sample standard deviation from population standard deviation?

If the population standard deviation is sigma, then the estimate for the sample standard error for a sample of size n, is s = sigma*sqrt[n/(n-1)]

### Give an example of how to find the standard deviation?

Look at the Wikipedia article on "Standard deviation" - it includes an example right at the beginning.