There is no correlation between xpm and Duration and there are no clusters. The values are standardized.
xpm Duration
Abaddon -0.611373 -0.906268
Alchemist 0.953255 -0.558111
Ancient Apparition -1.105216 2.053064
Anti-Mage 1.985468 0.022150
Arc Warden 1.595698 0.370306
Axe 0.404194 0.969910
Bane -1.309033 0.157544
Batrider -0.755641 -0.306665
Beastmaster -0.148250 -2.028106
Bloodseeker 1.018893 1.163330
Bounty Hunter -0.740484 -0.442059
Brewmaster 0.391066 -0.809558
Bristleback 0.450750 0.757147
Broodmother 0.360615 -3.207971
Centaur Warrunner 0.030394 0.118860
Chaos Knight 0.688266 -0.809558
Chen -1.822636 -2.550341
Clinkz 0.269399 -0.267981
Clockwerk -1.297665 0.428333
Crystal Maiden -1.484700 0.312280
Dark Seer -0.523674 0.234912
Dark Willow -0.773777 0.931226
Dawnbreaker 0.062469 -0.674164
Dazzle -1.471031 -0.577453
Death Prophet 0.091160 0.041492
Disruptor -1.663615 0.234912
Doom 0.098739 0.718463
Dragon Knight 0.222031 -0.055218
Drow Ranger 0.849993 1.143988
Earth Spirit -0.563328 -0.577453
Earthshaker -0.064748 0.873199
Elder Titan -0.580110 1.163330
Ember Spirit 1.009420 -0.016534
Enchantress -0.760784 0.544385
Enigma -1.535045 0.583069
Faceless Void 1.289566 1.027936
Grimstroke -1.351529 0.118860
Gyrocopter 1.167628 -0.422717
Hoodwink -0.633568 1.105304
Huskar 0.105100 -1.351135
Invoker 0.118904 0.621753
Io -1.737780 -2.975866
Jakiro -1.219034 0.583069
Juggernaut 1.349656 -0.403375
Keeper of the Light -0.785280 0.234912
Kunkka 0.675815 0.931226
Legion Commander 0.434239 -0.345349
Leshrac 0.176828 -0.229297
Lich -1.415408 0.834515
Lifestealer 1.025525 -0.480743
Lina 0.878008 0.718463
Lion -1.452084 0.525043
Lone Druid 0.034319 -3.072576
Luna 1.032427 -0.654822
Lycan -0.286429 -2.453631
Magnus -0.362488 -0.209955
Marci -1.096690 -1.583239
Mars -0.331496 -0.074560
Medusa 1.045284 1.820959
Meepo 1.700313 -2.975866
Mirana -1.046751 0.408991
Monkey King 0.485396 -0.267981
Morphling 1.173854 -1.389819
Muerta 1.062607 1.105304
Naga Siren 0.894248 -0.538769
Nature's Prophet -0.056086 -0.209955
Necrophos 0.906158 -0.229297
Night Stalker 0.274947 -0.538769
Nyx Assassin -0.085590 0.679779
Ogre Magi -0.310790 0.254254
Omniknight -0.624906 -0.616138
Oracle -1.740351 -1.177057
Outworld Destroyer 1.001029 -0.074560
Pangolier 0.831993 0.022150
Phantom Assassin 1.868131 -0.461401
Phantom Lancer 1.233943 0.757147
Phoenix -0.861204 0.254254
Primal Beast -0.076116 -0.035876
Puck 0.997375 -0.074560
Pudge -0.722755 -0.055218
Pugna -0.943489 0.118860
Queen of Pain 0.792746 0.602411
Razor 0.593801 0.467017
Riki 1.862853 0.950568
Rubick -1.200222 0.583069
Sand King 0.234617 1.260040
Shadow Demon -1.536534 0.602411
Shadow Fiend 1.185628 -0.944952
Shadow Shaman -1.459392 0.157544
Silencer -0.915880 0.679779
Skywrath Mage -1.063262 0.563727
Slardar 0.411908 -0.229297
Slark 1.124185 -0.113245
Snapfire -0.841039 0.312280
Sniper 0.633996 1.530829
Spectre 1.684479 1.318066
Spirit Breaker -0.027259 -0.035876
Storm Spirit 0.897225 0.234912
Sven 1.930115 -0.055218
Techies -1.065427 1.898327
Templar Assassin 1.590285 -0.944952
Terrorblade 0.490674 -0.248639
Tidehunter -0.506351 -0.209955
Timbersaw 0.078845 0.041492
Tinker 1.144080 0.718463
Tiny -0.139995 -0.055218
Treant Protector -1.310386 -0.732190
Troll Warlord 1.572014 -0.693506
Tusk -0.701371 -0.403375
Underlord -0.628831 0.215570
Undying -1.214568 -0.074560
Ursa 1.364814 0.292938
Vengeful Spirit -1.160163 -0.809558
Venomancer -1.331093 0.679779
Viper 0.161941 1.530829
Visage 0.025251 -2.202185
Void Spirit 0.766626 -0.364691
Warlock -1.428265 0.196228
Weaver 1.051239 0.892541
Windranger 0.057191 1.008594
Winter Wyvern -1.153937 0.950568
Witch Doctor -0.802197 0.911884
Wraith King 0.810881 -0.442059
Zeus 0.126618 1.704907