When reviewing cash flow data for your small business, knowing the standard deviation can help you determine if the numbers are out of whack. Calculating standard deviation manually can be ...

Usually when it comes to writing, mathematics and statistics probably aren’t the first things that come to mind. However, quite the number of us have had to face an instance where a source based on ...

The extent to which products meet specifications needs to be systematically monitored in a production process. Product quality will typically be defined by two quantities: deviations from stated ...

J.B. Maverick is an active trader, commodity futures broker, and stock market analyst 17+ years of experience, in addition to 10+ years of experience as a finance writer and book editor. T-tests are ...

The confidence interval for the variance has upper and lower limits equal to the squares of the corresponding upper and lower limits for the standard deviation. Figure 38.11 shows a table of the 95% ...

In the Moments table, N is the number of nonmissing observations, Mean is the arithmetic mean, Std Dev is the standard deviation, and Variance is the variance. Skewness and Kurtosis are both measures ...

Mean and variance of horizontal wind direction are defined in a minimal variance sense. Starting from a theoretical model, termed anisotropic Gaussian model, of the probability density functions of ...