Equation (13.30) underestimates the true variance.
The missing covariance terms are positive, so Eq. (13.26) underestimates the true variance.
These tests indicate that the true variance around sources does not differ greatly from the true variance away from sources ( 50%), so that this equation can provide the analyst a good estimate of the magnitude of the variances.
Person and item reliability coefficients were used as an indicator of true variance and error variance.
The ENVA, as the red line, is not at all close to the true variance.
However, true variance estimates are often not known and are, instead, based on published literature or pilot trials.
However, true variance estimates are not known and are, instead, based on published literature or pilot trials (Fuglsang 2013).
In this paper, satellite-based measurements (PS) are compared to classical geodetic measurements (TER) to investigate the precision of the true variance ∆PS,ij.
The true variance of the log-spectrum is presented as the blue line, and for K=1, this coincides very well with ψ ′ ( 1 ) = π 2 6 (cyan).
A full equation for the estimation of minimum significant activity difference, depending on the number of samples, standard deviation of the measurements and the true variance of the biochemical effect is developed.
However, when K increases, the ENVA and the true variance coincide very well, also in the variations of the spectrum, where the approximation from Equation 17 does not fit that well.
