By Ruben Geert van den BergunderT-Tests&Statistics A-Z Adichotomous variableis a variable that contains precisely two distinct values.Let's first take a look at some examples for illustrating this point. Next, w
a scholarly research institute – explained in an email that statistics tends to be a polarizing academic discipline that people either love or hate. "However, in a world, as ours, in which there is always a random aspect, only statistics is able to explain it," she wrote. ...
Multicollinearity is a concept in statistical analysis, where several independent statistics correlate. Multicollinearity can lead to skewed or confusing results if they appear in your project when you attempt to find the most dependable variable from amongst your various statistics. Learning about this ...
The slope of a linear equation can be found with the formula: y = mx + b. When dealing with a curved line, where the slope is changing, you can’t use the same formula. You have to divide the change in y-values by the change in x-values, represented as: m = change in y/chan...
RFC 4445 defines the delay factor (DF), which is a key indicator for measuring the transmission quality of data flows. DF indicates the delay and jitter of service traffic. A greater DF value indicates a higher jitter of the service traffic. When a microburst occurs on the network, the DF...
Contrasts, which is to say, tests of linear hypotheses involving factor variables and their interactions from the most recently fit model, and that model can be virtually any model that Stata can fit. Tests include ANOVA-style tests of main effects, simple effects, interactions, and nested effec...
anovaandmanovanow use Stata's new factor-variable syntax, which means new estimation and postestimation features and a few changes to what you type. In other estimation commands, covariates are assumed to be continuous unlessi.is specified in front of variable names. Inanovaandmanova, covariates...
In factor investing, each factor has a straightforward concept. For instance, the idea behind value is that over the long term, investing in undervalued stocks tends to yield better returns than investing in more expensive ones. The same general framework applies to the other factors as well: ...
xtregnow allows theinrangequalifier. All xt estimation commands now allow Stata’s new factor-variablevarlistnotation, with the exception of commandsxtabond,xtdpd,xtdpdsys, andxthtaylor. Also, estimation commands allow the standard set of factor-variable–related reporting options. ...
In general, if you are studying the effect of a certain factor or the outcome of an experiment, the effect or outcome is the dependent variable. If you measure the effect of temperature on flower color, temperature is the independent variable—the one you manipulate—while the color of the ...