Graphing Confidence Ellipses: An Update of Ellip for Stata 8
نویسندگان
چکیده
منابع مشابه
Graphing confidence ellipses : An update of ellip for Stata 8
This paper describes an update of the ellip command for graphing confidence ellipses in Stata 8. Two of the most notable new features are the option to graph confidence ellipses around variable means and the ability to add inscribed lines. These features allow a geometric characterization of linear regression with unequal error variances, as in McCartin (2003).
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Multivariate Normal Distribution and Confidence Ellipses
the Normal Distribution's familiar "bell curve". The latter term can be interpreted as a description of squared of distance (x between some value of x who's probability is being assessed (along the x axis), and the center of the probability density distribution, "standardized" by the distribution's known variance 2. It should be noted that f(x) only depends on this single scalar range var...
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ژورنال
عنوان ژورنال: The Stata Journal: Promoting communications on statistics and Stata
سال: 2004
ISSN: 1536-867X,1536-8734
DOI: 10.1177/1536867x0400400302