NEWS


PracTools 1.5 (2024-06-24)

PracTools 1.4.3 (2024-03-06)

PracTools 1.4.2 (2023-12-05)

PracTools 1.4.1 (2023-11-09)

PracTools 1.4 (2023-05-23)

PracTools 1.3 (2023-03-19)

   vignette("Distance-and-MOS-PSUs", package="PracTools")

PracTools 1.2.8 (2022-08-17)

PracTools 1.2.7 (2022-06-13)

PracTools 1.2.5 (2022-01-18)

PracTools 1.2.4 (2021-12-20)

PracTools 1.2.3 (2021-11-03)

PracTools 1.2.2 (2020-08-03)

PracTools 1.2.1 (2019-10-02)

   WARNING: e >= 1. This parameter setting leads to the lower limit of a 2-sided alpha level confidence interval being 0 or less. You may want to adjust the value of e. 

PracTools 1.1 (2018-10-21)

PracTools 0.9 (2018-06-13)

PracTools 0.8 (2018-01-05)

where $\small \pi {i}^{*}=m{{p}{i}}$. This estimator is somewhat biased when psu’s are selected with replacement. An approximately unbiased estimator is
[\small {{v}{PSU}}=\frac{1}{m\left( m-1 \right)}\sum\limits{i\in s}{{{\left( \frac{{{{\widehat{t}}}{i\pi }}}{{{p}{i}}}-{{{\widehat{t}}}{pwr}} \right)}^{2}}}-\frac{1}{{{m}^{2}}}\sum\limits{i\in s}{\frac{{{{\widehat{V}}}{i}}}{p{i}^{2}}}] Since $\frac{1-\pi {i}^{}}{{{\left( \pi _{i}^{} \right)}^{2}}}=\frac{1}{{{\left( m{{p}{i}} \right)}^{2}}}-\frac{1}{m{{p}{i}}}$, these two choices will be nearly equal when $\small {1}/{m{{p}{i}}};$ is negligible compared to $\small {1}/{{{\left( m{{p}{i}} \right)}^{2}}};$. This will occur when all values of $m{{p}{i}}$ are small. The corrected estimator of $\small B^2$ is [\small {{\widehat{B}}^{2}}=\frac{m{{v}{psu}}}{\widehat{t}{pwr}^{2}} ]

PracTools 0.7 (2017-11-23)

Valliant, R., and Dever, J. (2011), “Estimating Propensity Adjustments for Volunteer Web Surveys,” Sociological Methods and Research, 40, 105-137.  

PracTools 0.6 (2017-07-26)

PracTools 0.5 (2017-07-11)

PracTools 0.4 (2016-10-23)

PracTools 0.3 (2015-11-16)

PracTools 0.2 (2015-06-01)

PracTools 0.1 (2015-01-21)

PracTools 0.0-2 (2014-06-22)