Each chapter introduces a type of graph, explains when and why it is useful for visualizing a particular kind of data, demonstrates how to create that graph using Stata, and shows a few variations. The special graph section covers topics such as how to create maps, plot equations, create ...
You can check for outliers, leverage points and influential points using Stata. Assumption #8: The residuals (errors) should be approximately normally distributed, which you can check in Stata using a histogram (with a superimposed normal curve) and Normal P-P Plot, or a Normal Q-Q Plot of...
Residual plot:Create a plot of residuals against time (t) and look for clusters of consecutive residuals on one side of the zero line. You can also try adding aLowess line, as shown in the image below. Durbin-Watson test. Available in a wide variety of software packages. Simple to use,...
You can also change the x-dimension variable in your plot by specifying xdimension in the graph option. Please note that the sample size equals 3*n (repeat time in each dosage level) in this power analysis because we have three levels of drug dosage. ...
So before I began working on this new project, the one pitched by my lawyer friend, I had to re-familiarize myself with the script writing process. I needed a plan that uplifted my friend's pitch with an entertaining plot andSTRUCTURE. ...
Publication bias can be examined in multiple ways (Rothstein et al. 2005). First, the funnel plot is a simple graphical tool that can provide an overview of the effect size distribution and help to detect publication bias (Stanley and Doucouliagos 2010). A funnel plot can also support in...
In the UK, cohabitation has become the normative type of first co-residential partnership. While some couples go on to marry, others increasingly continue to cohabit or break up. One possible explanation is the rise in young people’s economic precariousness. However, few studies have analysed th...
2. Does proc phreg produce "excess hazard ratio" as used on the y-axis int he plot below over a survival time in weeks? I know these authors mostly use stata software. But I can't imagine that SAS wouldn't have a way to produce something close. I keep reading ...
Learn about factor analysis - a simple way to condense the data in many variables into a just a few variables.
Combining OR and IPW gave us a doubly robust estimand which required only one of the OR or IPW approaches to be correctly specified. We used the csdid community-contributed command in Stata [22]. 2.3 Assumptions We made the following assumptions: 1. Irreversibility of treatment: since the ...