I planed to extend nonWinferiority testing to one of my statistical notes, Equivalence Testing and TOST (Two One-Sided Test) since noninferiority test is simply half part of the equivalence test. Today I’m glad to find an even better explanation from SAS Usage Note 48616: Design and analysis of noninferiority studies You will love it if […]
Tag: Statistics
Confidence Intervals for Difference Between Independent Binomial Proportions: A SAS 9.4/STAT 12.3 Update
For the computing of confidence intervals for difference between two independent binomial proportions in SAS 9.4/STAT 12.3, it’s hard to figure out exactly how many methods are available because there is no “CL=ALL” trigger in RISKDIFF option (but you can get one in BIONOMIAL option to compute the confidence intervals for binomial proportion). As far […]
Confidence Intervals for Binomial Proportion: A SAS 9.4/STAT 12.3 Update
After getting the access to SAS 9.4 alone with SAS/STAT 12.3, I first took a look at my favorite SAS statistical procedure, PROF FREQ. Last year I had a note on confidence intervals for binomial proportion based on SAS 9.2/SAS9.3. Now it’s time to throw out some updates. 1. A new confidence limits method added, […]
Trends in the Analytics Job Market
Tracking the job market for statistics, analytics, data mining and the like used to be a major undertaking. However, on November 10, 2011 the world’s largest web site for job postings, Indeed.com, released a tool that allows you to examine trends … Continue reading →
Calculate RMSE and MAE in R and SAS
Here is code to calculate RMSE and MAE in R and SAS. RMSE (root mean squared error), also called RMSD (root mean squared deviation), and MAE (mean absolute error) are both used to evaluate models. MAE gives equal weight to all errors, while RMSE gives…
SAS Dominates Analytics Job Market; R up 42%
I’m continuing to gather and analyze data to update The Popularity of Data Analysis Software. In this installment I cover the latest employment figures. Employment is important to us all, so what software skills are employers seeking? A thorough answer … Continue reading →
Forecast Update: Will 2014 be the Beginning of the End for SAS and SPSS?
I recently updated my plots of the data analysis tools used in academia in my ongoing article, The Popularity of Data Analysis Software. I repeat those here and update my previous forecast of data analysis software usage. Learning to use … Continue reading →
SAS, SPSS, Stata Users: Learn R from Home June 17
Has learning R been driving you a bit crazy? If so, it may be that you’re “lost in translation.” On June 17 and 19, I’ll be teaching a webinar, R for SAS, SPSS and Stata Users. With each R concept, … Continue reading →