How the heck do I figure out the Standard Deviation of something, I do not know what this means and really need help with it. It's for Bio. Can you tell me how it works?
2007-01-27 02:43:18 · 3 answers · asked by Wonderious 3 in Science & Mathematics ➔ Mathematics
In probability and statistics, the standard deviation of a probability distribution, random variable, or population or multiset of values is a measure of the spread of its values. It is defined as the square root of the variance.
The standard deviation is the root mean square (RMS) deviation of the values from their arithmetic mean. For example, in the population {4, 8}, the mean is 6 and the standard deviation is 2. This may be written: {4, 8} ≈ 6±2. In this case 100% of the values in the population are within one standard deviation of the mean.
Standard deviation is the most common measure of statistical dispersion, measuring how widely spread the values in a data set are. If the data points are all close to the mean, then the standard deviation is close to zero. If many data points are far from the mean, then the standard deviation is far from zero. If all the data values are equal, then the standard deviation is zero.
Plain English examples of standard deviation in real life
The practical value of understanding the standard deviation of a set of values is in appreciating how much variation there is away from the "average" (mean).
2007-01-27 02:54:27 · answer #1 · answered by landhermit 4 · 0⤊ 0⤋
a million. propose Deviation does not evaluate the algebraic indicators (plus or minus) in its calculation that's illogical. the common deviation takes those under consideration. 2. propose deviation could be computed from Median, Mode or propose and its fee differs in those situations (till the distribution is ordinary). the common deviation is often calculated from the arithmetic propose. 3. The mathematical properties possessed via regular deviation are a techniques greater desirable than those possessed via propose Deviation i discovered this on an internet site, listed under. with a bit of luck which could help :)
2016-12-16 14:48:37 · answer #2 · answered by holness 4 · 0⤊ 0⤋
Are you using Excel? If you are, just highlight the list of numbers and use the standard deviation command (under the fx symbol).
2007-01-27 02:51:37 · answer #3 · answered by Lydia T 2 · 1⤊ 0⤋