×

Reading Mode

Viewing variable 105 of 753

Previous Variable Next Variable
Variable Name df_qwi_z_na
Label Degrees of freedom for QWI: average quarters of inactivity before accessions
Codebook National QWI
Concept
Type numeric
Direct Link df_qwi_z_na

Summary Statistics

vald   38340
invd   0
min   199.118
max   495768.542
mean   670.547
stdev   5512.114

Full Description

Degrees of freedom for a generic variable `X` are defined as:

`df[\bar{X}_{agkt}] =\ (M-1)(1 + 1/(M+1) \frac{1/M sum_{l=1}^M V^{(l)} [\hat{X}_{agkt}]}{B[\bar{X}_{agkt}]})^2`

where `V^{(l)}[\hat{X}_{agkt}]` and `B[\bar{X}_{agkt}]` are respectively the within implicate variance and the between implicate variance of `X`.