Topic: Explaining Standard Deviation
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Answers to Common Questions
What is Standard Deviation?
Standard deviation measures how spread out your data are in relation to the average. For instance. The average IQ is 100 with a standard deviation of 15. This means that the range of average IQ would include everything from 15 points below ... Read More »
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How to Find Standard Deviation?
Standard deviation is a measure of the spread of a set of values from the average value. It is often used in finance, to help determine an investment's risk. Read More »
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How to do Standard Deviation?
Standard deviation is a long, but simple process. In order to do standard deviation you need a set of value and the average, or mean, of those values. Once you get the mean, subtract it from each value and square that answer. Add up all the... Read More »
Source: http://answers.ask.com/Reference/Dictionaries/how_to_do_standard_...
More Common Questions
Answers to Other Common Questions
The first step is to determine the mean: add all the numbers together and divide the sum by how many numbers you added together. Subtract the mean from each number to create a list then square each result. Add the squares together and divid...
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Source: http://answers.ask.com/Reference/Dictionaries/how_to_calculate_th...
Simply, standard deviation is the "mean of the mean". It gives the reasoning behind the data and shows how much variation is from the average, or mean. This concept is used to measure algebraic variables.
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Source: http://answers.ask.com/Reference/Dictionaries/what_is_standard_de...
A standard deviation is widely used in different ways today, but what exactly is it. A standard deviation is a widely used measure of dispersion, in math. Look here for more information: http://en.wikipedia.org/wiki/Standard_de...
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Standard deviation measures how much a given data point is different from the average. For instance the average IQ is 100. But, the range that is considered normal is a standard deviation of 15. So, a normal IQ is anywhere from 85 (15 below...
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Standard deviation shows ranges of observations. So if in the case of IQ the mid point is set at 100. 68 percent of your responses are with in 1 standard deviation up or down from that 100. 95% should be within 2 standard deviations and 99%...
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Source: http://answers.ask.com/Science/Physics/what_does_standard_deviati...
A higher standard deviation means that the data are fluctuating more widely with respect to the mean. It could mean there are some bad samples, or it could simply mean that the data are not as tightly bound to the mean as anticipated. An un...
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Source: http://wiki.answers.com/Q/What_does_the_higher_standard_deviation...
Standard deviation "is the numerical value that describes the spread of scores away from the mean and is expressed in the same units as the original scores. The wider the spread of scores, the larger the standard deviation," according to R....
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Source: http://www.ehow.com/how_5424647_calculate-standard-deviation-hand...
