There is no correlation between Duration and Tower Damage and there are no clusters. The values are standardized.
Duration Tower Damage
Abaddon -1.249298 0.378897
Alchemist -0.656656 0.607309
Ancient Apparition 2.019211 -1.079612
Anti-Mage -0.117891 1.972627
Arc Warden -0.369315 1.312144
Axe 0.780051 -0.808675
Bane -0.171768 -0.965656
Batrider -0.315438 -1.139747
Beastmaster -2.111322 0.131383
Bloodseeker 1.121269 0.397004
Bounty Hunter -0.189726 -0.708839
Brewmaster -0.836245 0.520097
Bristleback 0.636380 -0.035731
Broodmother -3.009264 1.541054
Centaur Warrunner 0.079656 -0.447536
Chaos Knight -0.369315 0.679071
Chen -3.009264 -0.028090
Clinkz 0.097615 1.865813
Clockwerk 0.564545 -1.034262
Crystal Maiden 0.241286 -1.129115
Dark Seer 0.313121 -0.923296
Dark Willow 0.923721 -0.755351
Dawnbreaker -0.333397 -0.505013
Dazzle -0.674615 -0.999378
Death Prophet 0.043738 0.187530
Disruptor 0.241286 -1.236593
Doom 0.690257 -0.866982
Dragon Knight -0.315438 1.116624
Drow Ranger 0.869845 1.714647
Earth Spirit -0.297479 -0.962998
Earthshaker 1.013516 -0.703689
Elder Titan 0.923721 -0.739238
Ember Spirit 0.043738 -0.310822
Enchantress 0.259245 -0.371787
Enigma 0.349039 -0.442386
Faceless Void 0.887804 0.471923
Grimstroke 0.151491 -1.144066
Gyrocopter 0.277203 0.255638
Hoodwink 0.690257 -0.761498
Huskar -1.195421 0.652825
Invoker 0.708215 -0.052177
Io -3.332523 -0.737743
Jakiro 0.600462 -0.293878
Juggernaut -0.333397 1.397030
Keeper of the Light 0.241286 -1.083599
Kunkka 0.905763 -0.581094
Legion Commander -0.046056 0.276071
Leshrac -0.890121 1.636904
Lich 0.977598 -1.176293
Lifestealer -0.530944 1.569958
Lina 0.528627 0.656313
Lion 0.582504 -1.213171
Lone Druid -2.829675 2.868663
Luna -1.195421 2.438586
Lycan -2.039487 1.984255
Magnus -0.261562 -0.693888
Marci -1.949692 0.145669
Mars -0.153809 -0.716148
Medusa 1.588198 1.304503
Meepo -3.170893 2.079108
Mirana 0.349039 -0.746049
Monkey King -0.189726 0.307467
Morphling -1.303174 2.118644
Muerta 0.762092 0.839042
Naga Siren -0.297479 1.118950
Nature's Prophet 0.187409 0.338531
Necrophos 0.061697 -0.616810
Night Stalker -0.441150 0.085036
Nyx Assassin 0.690257 -1.075127
Ogre Magi 0.277203 -0.730434
Omniknight -0.548903 -0.446041
Oracle -1.410927 -1.200546
Outworld Destroyer 0.456792 -0.059486
Pangolier -0.189726 -0.576941
Phantom Assassin 0.277203 0.315441
Phantom Lancer 0.977598 0.989877
Phoenix 0.259245 -0.968812
Primal Beast 0.349039 -0.727111
Puck 0.061697 -0.013472
Pudge -0.117891 -0.932765
Pugna -0.477068 0.711796
Queen of Pain 0.600462 -0.100351
Razor 0.582504 0.246336
Riki 1.139228 -0.379428
Rubick 0.546586 -1.136424
Sand King 1.318816 -0.936585
Shadow Demon 0.259245 -1.053034
Shadow Fiend -0.836245 1.768302
Shadow Shaman 0.061697 0.067261
Silencer 0.851886 -0.590065
Skywrath Mage 0.887804 -1.130943
Slardar -0.297479 -0.288562
Slark 0.043738 0.540363
Snapfire 0.456792 -0.486075
Sniper 1.695951 0.826417
Spectre 1.552281 -0.042874
Spirit Breaker 0.187409 -0.888079
Storm Spirit 0.133533 -0.180918
Sven 0.295162 1.032403
Techies 1.785746 -0.880770
Templar Assassin -0.943998 1.236063
Terrorblade -0.189726 1.573115
Tidehunter -0.243603 -0.638571
Timbersaw 0.061697 -0.546044
Tinker -0.081973 -1.295731
Tiny -0.459109 -0.085400
Treant Protector -0.297479 -0.996221
Troll Warlord -0.782368 2.531113
Tusk -0.405232 -0.986088
Underlord 0.456792 -0.261485
Undying 0.043738 -1.012169
Ursa 0.223327 0.309793
Vengeful Spirit -0.620739 -0.934426
Venomancer 0.546586 -0.841400
Viper 1.480445 0.510296
Visage -2.201116 1.492216
Void Spirit -0.261562 -0.002009
Warlock 0.690257 -0.181250
Weaver 0.798010 1.129083
Windranger 0.815968 0.219757
Winter Wyvern 0.618421 -0.764488
Witch Doctor 0.959639 -1.161010
Wraith King -0.099932 0.861468
Zeus 1.498404 -0.788076