ATKPLOT: Stata module to generate Atkinson residual normality plots
atkplot graphs the half-normal plots with the confidence bands for regression residuals as suggested by Atkinson (1985) and described in Smith and Young (2001). This is a graphical tool to assess the normality of the residuals. For this purpose, absolute values of the residuals are ordered and plotted against the expected order statistics of the (half-)normal distribution. The k-th percentile of interest is calculated using Blom (1958) approximation (k-3/8)/(N+1/4), where N is the total number of observations. The confidence bands for the residuals are obtained via simulation with the normal errors. No Bonferroni or any other simultaneity correction is made.
|Requires:||Stata version 6.0|
|Date of creation:||20 Sep 2000|
|Contact details of provider:|| Postal: Boston College, 140 Commonwealth Avenue, Chestnut Hill MA 02467 USA|
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