12P3

解答

12 P 3

1320

求解步骤

= \frac{n !}{( n - r ) !}

代入

n = 12, r = 3

= \frac{12 !}{( 12 - 3 ) !}

\frac{12 !}{( 12 - 3 ) !} = 1320

= 1320

in t er q u a r t i l e 2, 5, 8, 8, 9, 10, 10, 14, 15, 18, 21, 21

s t d 100000, 200000, 300000, 400000, 500000

in t er q u a r t i l e 81, 89, 78, 82, 84, 86, 79, 72, 73, 75

s t d 4, 7, 10, 12, 16, 17

m e d ian 0.93, 0.9, 0.89, 0.92, 0.93, 0.86, 0.93, 0.87, 0.8, 0.9