![]() Much of this SAS code has run reliably for decades on platforms ranging from Windows desktops to giant IBM System Z mainframes and Power servers. However, by all accounts, there remains a sizable group of SAS customers with large amounts of SAS code that has not been moved into Viya. SAS is considered to be the world’s largest privately held software company, with 2019 revenues of $3.1 billion (JHVEPhoto/Shutterstock) The company, which boasted 83,000 customers in 147 countries supports just a few years ago, has supported Python in AI and analytic libraries in Viya, its modern flagship offering that it’s encouraging its giant installed base to migrate to. SAS–the Cary, North Carolina company–has made inroads with the open analytic community. The meteoric rise of Python, in particular, has many companies casting their analytic bets with the uber popular scripting language, which can be used to program a slew of data-related tasks, including data engineering, analytics, and AI. The SAS code and SAS Institute’s tools and runtime engines spread into all industries, cementing themselves as the undisputable standard for corporate analytics in the US and abroad.īut that analytic hegemony has been tested in recent years thanks to the rise of open languages like Python and R. These plots might help you to support your conclusion ( the histogram) or test the normality assumption (the Q-Q plot).American companies that have relied on SAS-based data analytics routines for decades but would like to separate themselves from the SAS Institute and its maintenece fees may be interested in another SAS runtime option that recently became available from Altair.įor decades, SAS Institute was the dominant provider of analytics software, based on the widespread use of the Statistical Analysis System (SAS) language that its co-founders, including SAS CEO Jim Goodnight, created in the late 1960s at North Carolina State University. Since the p-value of the Satterthwaite is also lower than 0.05, we reject the null hypothesis and conclude that the means of the two groups are statistically different.īesides the test statistics, p-values, and confidence intervals, the TTEST procedure also generates two plots. Therefore, we should use the Satterthwaite method to draw conclusions about the two-sample t-test. ![]() So, in our example, the p-value of the Equality of Variance test is lower than 0.05, and hence significant. Otherwise, the Satterthwaite method (i.e., the Welch’s t-test) is the one you need. If the p-value of the Equality of Variances test is greater than your significance level (e.g., 0.05), then we assume that the variances are equal and you should use Pooled method to draw the correct conclusion.
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