Re: [問題] 其實許庭綸那球不該傳本壘的吧?
簡單的結論:
助殺成功率 大於 45.45% 時,傳向本壘會使勝率上升,反之下降。
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
稍微的計算:
根據傳球選擇及結果,查詢野球革命的勝率期望數據,如下:
1. 傳向本壘助殺成功: 客+3,2出局,三壘有人; 客勝率89% / 主勝率11%
2. 傳向三壘防止推進: 客+2,1出局,二壘有人; 客勝率83% / 主勝率17%
3. 傳向本壘助殺失敗: 客+2,1出局,三壘有人; 客勝率78% / 主勝率22%
假設傳向本壘助殺成功率是AS%,則傳向本壘勝率為:
89% x AS% + 78% x (1-AS%) = 78% + 11% x AS%
﹌﹌﹌﹌﹌﹌﹌﹌
若要 大於 傳向三壘勝率 83%,可得:
78% + 11% x AS% > 83% => 11% x AS% > 5%
=> AS% > 5/11 = 45.45...%
=> 助殺成功率須 大於 45.45%
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
我自己看轉播當下直覺不應該傳本壘,查數據後覺得傳了很冒險。
也有可能是我太低估許庭綸的臂力或高估蘇智傑的速度。
不知道棒球版的各位轉播當下或看影片時預估這個助殺的成功率是多少?
推文可以開始戰了?
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