Gaussian integration can be used to obtain surprisingly accurate evaluations of definite integrals with as few as 10 or 20 function evaluations. In this presentation, it will be shown how to incorporate tables of Gaussian integration weights into Stata data sets and use them to evaluate...

Stata's graphics are more flexible than many realise. We will exploit this flexibility and explore a potpourri of topics, some of interest to all graphers and others primarily of interest to those creating highly customised graphs or new graph commands. Among the topics will be creating custom...

Density distribution sunflower plots are used to display high-density bivariate data. They are useful for data where a conventional scatter plot is difficult to read due to overstriking of the plot symbol. The x-y plane is subdivided into a lattice of regular hexagonal bins of width w specified...

Meta-analysis is considered the highest level of evidence on effectiveness of healthcare interventions. It provides important information by capitalizing on the large numbers of studies performed to assess the impact of healthcare interventions, helps reduce variability and uncertainty among...

Graphics and categorical data are odd bedfellows. A pie chart of the frequencies of a categorical variable may be the first statistical technique taught to young children, and there is a very substantial if self-contained literature on biplots and related methods. Yet in between many texts and...

Traffic accidents results from the interaction of different parameters which includes highway geometrics, traffic characteristics and human factors. Geometric variables include number of lanes, lane width, median width, shoulder width, roadway length, number of intersections, access density and...

The N/I distributions are the ratio of a normal distribution to an independent distribuiton. They include the normal, Cauchy, t, slash for various cases of the denominator distribution. The author has developed a program that will generate these distributions for use in simulations....

In studies which collect survey data, the investigator(s) often construct the questionnaire using a word processor and then deliver it to a survey organization which translates it into an electronic data collection instrument (e.g., CAPI or CATI). Unfortunately, this approach suffers from the...

This talk will discuss the -svr- suite of user-written commands for Stata. These commands facilitate the analysis of data from surveys with complex sampling plans, and represent an alternative to official Stata's Taylor series linearization-based -svy- commands. I will touch briefly on the...

This presentation will discuss the issues involved with teaching statistics with Stata to physicians in a MS program at Albert Einstein College of Medicine (AECOM). The Clinical Research Training Program (CRTP) at AECOM is a 2-year course of study for physicians wishing to earn a Master of...