"churn?" "No" "Yes" "day.charge" "0-11.3" 62 10 "11.3-16.7" 140 17 "16.7-20.3" 197 25 "20.3-23.2" 206 39 "23.2-25.6" 268 26 "25.6-27.9" 275 37 "27.9-30" 261 32 "30-32" 245 15 "32-34.2" 290 20 "34.2-36.5" 272 16 "36.5-39.1" 248 39 "39.1-42.2" 203 46 "42.2-45.9" 115 56 "45.9-50.8" 55 72 "50.8-59.6" 13 33