What is a post estimation test?
Postestimation commands are commands that apply to the most recently used estimation command, i.e. commands that retrieve information from a regression model for further inspection and analysis. Postestimation commands for the analysis of residuals and regression diagnostics are documented here.
What does the predict command do in Stata?
predict calculates the requested statistic for all possible observations, whether they were used in fitting the model or not. predict does this for standard options 1 through 3 and generally does this for estimator-specific options 4.
Which of the following estimation methods are provided by Stata?
The related Stata commands are anova, oneway, and loneway. anova fits ANOVA and ANCOVA models, one-way and up—including two-way factorial, three-way factorial, etc.
What does Lincom do in Stata?
lincom is a postestimation command for use after sem, gsem, and nearly all Stata estimation commands. lincom computes point estimates, standard errors, z statistics, p-values, and confidence intervals for linear combinations of the estimated parameters.
What is Testparm Stata?
testparm provides a useful alternative to test that permits varlist rather than a list of coefficients (which is often nothing more than a list of variables), allowing the use of standard Stata notation, including ‘-‘ and ‘*’, which are given the expression interpretation by test. test and testparm perform Wald tests.
How do you predict a residual?
To find a residual you must take the predicted value and subtract it from the measured value.
What is xi command in Stata?
Description. xi expands terms containing categorical variables into indicator (also called dummy) variable sets. by creating new variables and, in the second syntax (xi: any stata command), executes the specified. command with the expanded terms.
What is R () in Stata?
Notice that instead of using the actual value of the mean of read in this command, we used the name of the returned result (i.e. r(mean)), Stata knows when it sees r(mean) that we actually mean the value stored in that system variable. This is because Stata uses the r(…) as a placeholder for a real value.
What is Nlcom?
nlcom is a postestimation command for use after sem, gsem, and other Stata estimation commands. nlcom computes point estimates, standard errors, z statistics, p-values, and confidence intervals for (possibly) nonlinear combinations of the estimated parameters.
How does Lincom work?
lincom computes point estimates, standard errors, t or z statistics, p-values, and confidence intervals for linear combinations of coefficients after any estimation command, including survey estimation. Results can optionally be displayed as odds ratios, hazard ratios, incidence-rate ratios, or relative-risk ratios.