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By-Processing - Part 1 (The aggregate()… duration 7 minutes 15 seconds By-Processing - Part 1 (The aggregate()… By-Processing - Part 1 (The aggregate() Function).mp4	By-Processing - Part 1 (The aggregate() Function).mp4 There are several different functions and methods available in R to compute statistics or, more generally, apply functions to groups of observations within a data set. The tapply() function is one… firefighter aggregate() educational assessment and evaluation examinations rescue workers with() t.test() fire department by-processing education and upbringing septicemia spouses measurement (mathematics) From Daniel Hall 87 plays 0 Copyright I created all of this content
The Output Statement - Part 4 (FEV Example,… duration 6 minutes 32 seconds The Output Statement - Part 4 (FEV Example,… The Output Statement - Part 4 (FEV Example, Revisited)	The Output Statement - Part 4 (FEV Example, Revisited) In this video we return to the FEV Example and show how the OUTPUT statement, in conjunction with a Sum statement, can be used to compute and store posttest-pretest differences even when the posttest… fire department pulmonary function rescue workers foreign affairs defence and public order and safety activities pulmonary function testing search & rescue medical tests and examinations firefighting fire prevention and rescue firefighter emergency services programming spirometry software From Daniel Hall 186 plays 0 Copyright I created all of this content
More on PROC MEANS-The FEV Example duration 9 minutes 57 seconds More on PROC MEANS-The FEV Example More on PROC MEANS-The FEV Example	More on PROC MEANS-The FEV Example A common use of PROC MEANS is to produce statistics for each by group and write those results to an output dataset so that they can be analyzed further. This video considers an example of this sort… firefighter pulmonary function getting well spirometry fire department computers foreign affairs defence and public order and safety activities medical tests and examinations rescue workers emergency services search & rescue firefighting fire prevention and rescue pulmonary function testing From Daniel Hall 169 plays 0 Copyright I created all of this content