Scott Janish's "Relationship of ABV to Beer Scores" on May 25, 2015 archival data beer correlation data set discussion prompt graphs and charts influential observations outliers regression +
Richard Harris' "Why Are More Baby Boys Born Than Girls?" on May 18, 2015 best practices in research methods biology causality developmental psychology discussion prompt NPR research methods scientific method +
National Geographic's "Are you typical?" on May 15, 2015 median mode multiculturalism National Geographic nominal variables video +