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Q: What does sigma x mean in statistics?
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What is sigma in statistics?

Since this is regarding statistics I assume you mean lower case sigma (σ) which, in statistics, is the symbol used for standard deviation, and σ2 is known as the variance.


What does the greek capital sigma symbol mean in statistics?

It means the sum total.


How do you compute one sigma deviation?

Let x denote the values of the variable in question. Suppose there are n observations. Let Sx = the sum of all the values. then the mean of x, Mx = Sx/n Let Sxx = the sum of all the squares of the values. The Vx (= the variance of x) is Sxx - (Mx)^2 and sigma(x) = sqrt(Vx). Therefore one sigma deviation, relative to the mean, = Mx - sigma(x), Mx + sigma(x).


Coefficient of Deviation?

Coefficient of deviation (CV) is a term used in statistics. It is defined as the ratio of the standard deviation (sigma) to the mean (mu). The formula for CV is CV=sigma/mu.


What is Z statistics?

z = (x - mean of x)/ std dev of x I thought this website was pretty good: http://www.jrigol.com/Statistics/TandZStatistics.htm


How do you figure sigma or mu in statistics?

Sigma is used to represent the standard deviation of a dataset. The calculation is rather complex, but if you think of it as the "root of the mean of the squares of the differences" ... rms of differences ... it might make more sense.Enter "standard deviation" on you search engine of choice for details. Wikipedia has a couple of basic examples, and a whole lot more!Mu represents the population mean, or "average" - add all the values and divide by how many.In statistics, you often don't know the population mean, so you take samples and find "x bar", the sample means, then using those to calculate an estimate of the population mean.


In statistics what is summation?

in statistics, summation denoted by upper case sigma, is used to find the sum of a series of observation in a particular variable.


What is the braking distance that corresponds to z equals 1.8 with a mean 45.1 and sigma 0.5?

X=46


What is the Z score formula for statistics?

z=x-mean / sd


Relationship between rayleigh distribution and gaussian distribution?

If X and Y are independent Gaussian random variables with mean 0 and standard deviation sigma, then sqrt(X^2 + Y^2) has a Rayleigh distribution with parameter sigma.


What skills utilizes analytical tools such as statistics forecasting and LEAN Six Sigma?

Quantitive Skills


What amount spent on books has a standardized score equal to 0.5 if the mean amount spent was 300 and the standard deviation is 100?

The formula for Z-Score is: (x-mu)/sigma. We know from the information given that Z=0.5, mu=300 & sigma=100. Solve for x and plug in the values. X=Z*sigma+mu; x=0.5*100+300 or x=350. So, $350 is amount spent on books.