Best Answer

The standard deviation of a set of data is a measure of the random variability present in the data. Given any two sets of data it is extremely unlikely that their means will be exactly the same. The standard deviation is used to determine whether the difference between the means of the two data sets is something that could happen purely by chance (ie is reasonable) or not.

Also, if you wish to take samples of a population, then the inherent variability - as measured by the standard deviation - is a useful measure to help determine the optimum sample size.

User Avatar

Wiki User

โˆ™ 2015-01-07 12:29:19
This answer is:
User Avatar
Study guides


20 cards

A polynomial of degree zero is a constant term

The grouping method of factoring can still be used when only some of the terms share a common factor A True B False

The sum or difference of p and q is the of the x-term in the trinomial

A number a power of a variable or a product of the two is a monomial while a polynomial is the of monomials

See all cards
1216 Reviews

Add your answer:

Earn +20 pts
Q: What is the purpose of finding standard deviation?
Write your answer...
Still have questions?
magnify glass
Related questions

What are the steps involved in management directing?

1. establishment of standard 2. fixation of the standard 3. compairing actual performance with standard performance 4. finding out the deviation 5. correcting the deviation

When finding standard deviation you are typically looking at what kind of distribution?

Usually a normal distribution.

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.

What is the essence of finding the standard deviation of your data?

I am not entirely sure I understand correctly what you mean by "essence". However, the idea of finding the standard deviation is to determine, as a general tendency, whether most data points are close to the average, or whether there is a large spread in the data. The standard deviation means, more or less, "How far is the typical data point from the average?"

What is the purpose of standard deviation error?

The purpose is to show how close one answer is to the other. Basically, to show how far off an answer is.

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

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

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.

Can a standard deviation of a sample be equal to a standard deviation of a population?


What is standard deviation used for?

Standard deviation is a measure of the spread of data.

People also asked