R language Visual facet chart, hypothesis test, multivariable grouping t-test, visual multivariable grouping faceting boxplot, and add significance levels and jitter points

R Language visualization facet 、 Hypothesis testing 、 Multivariable grouping t test 、 Visual multivariable grouping facet box diagram （faceting boxplot） And add significance level 、 Add jitter data point （jitter points）

 

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