library(reshape2) library(tidyverse) data(tips) head(tips) total_bill tip sex smoker day time size 1 16.99 1.01 Female No Sun Dinner 2 2 10.34 1.66 Male No Sun Dinner 3 3 21.01 3.50 Male No Sun Dinner 3 4 23.68 3.31 Male No Sun Dinner 2 5 24.59 3.61 Female No Sun Dinner 4 6 25.29 4.71 Male No Sun Dinner 4 summary(tips) total_bill tip sex smoker Min. : 3.07 Min. : 1.000 Female: 87 No :151 1st Qu...