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Samples from a normal distribution have an expected skewness of 0 and an expected excess kurtosis of 0 (which is the same as a kurtosis of 3). As the definition of JB shows, any deviation from this increases the JB statistic. For small samples the chi-squared approximation is overly sensitive, often rejecting the null hypothesis when it is true.
Jostel's TSH index (TSHI or JTI), also referred to as Jostel's thyrotropin index or Thyroid Function index (TFI), is a method for estimating the thyrotropic (i.e. thyroid stimulating) function of the anterior pituitary lobe in a quantitative way.
In electrical engineering, susceptance (B) is the imaginary part of admittance (Y = G + jB), where the real part is conductance (G). The reciprocal of admittance is impedance (Z = R + jX), where the imaginary part is reactance (X) and the real part is resistance (R). In SI units, susceptance is measured in siemens (S).
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At slenderness values lower than this point (occurring in specimens with a relatively short length compared to their cross section), the graph will follow the Johnson parabola; in contrast, larger slenderness values will align more closely with the Euler equation. Euler's formula is
In finite dimensions, a JB algebra is isomorphic to a Euclidean Jordan algebra. [4] The spectral radius on a JB algebra defines an equivalent norm also satisfying the axioms for a JB algebra. A state on a unital JB algebra is a bounded linear functional f such that f(1) = 1 and f is non-negative on the positive cone. The state space is a convex ...
Vickers values are generally independent of the test force: they will come out the same for 500 gf and 50 kgf, as long as the force is at least 200 gf. [6] However, lower load indents often display a dependence of hardness on indent depth known as the indentation size effect (ISE). [ 7 ]
The Breusch–Godfrey test is a test for autocorrelation in the errors in a regression model. It makes use of the residuals from the model being considered in a regression analysis, and a test statistic is derived from these.