1. a. 由題目知每日lunch費用之分佈範圍是 4 ± 0.25 取自然公差 ± 3σ, 即σ= 0.25/3 利用Excel繪製此費用之分佈草圖,步驟如下: 編輯 / 填滿 / 數列 在A2:A22製造數列 3.750,3.775,3.800,.....,4.250 B2輸入公式 =NORMDIST(A2,4,0.25/3,FALSE) 再用填滿控...
...2.if $3000 is invested in a saving account that earns... will the amount at least double? ANSWER : 假設需投資T年。3000*(1+ 5... continuously is equivalent to an effective rate of 5.3%? ANSWER ...
... in complex analysis.. With these two properties in mind, we know the answers to 002&003 must be circle or straight line on w-plane. To find it out the equation...
...3,1)C(2,2) = 12種 因此係數為18*12 = 216 3.A student is to answer seven out of 10 questions on an examination. In how many ways can he make his selection if he must answer at least four...
...p^2(1-p)^{n-2}]/[C(n,2)p^2(1-p)^{n-2}] = 1/C(n,2). (c) ' in what sense are successes distributed completely at random"...
正確的年收益公式: R(t) = 350(1 – 0.1)t (39t + 68) Million (1 – 0.1)t = 0.9t = e t ln 0.9 ln 0.9 = - 0.10536 ≒ - 0.1 所以原式變為: R(t) = 350 e- 0.1t (39t + 68) Million dR(t)/dt = - 35 e- 0.1t (39t + 68) Million + 13650 e- 0.1t Million R(2...
B2少一個向量 2008-10-17 19:40:45 補充： 計算的數字不漂亮 1.(1)Let 1=a(4x-1)+b(2x^2-x)+c(3x^2+3)展開整理得 =>1=(2b+3c)x^2+(4a-b)x+(3c-a) =>2b+3c=0,4a-b=0,3c-a=1 =>a=-1/11,b=-4/11,c=10/33 (2)同理let x=a(4x-1)+b(2x^2-x)+c(3x^2+3)展開整理得 =>x=(2b+3c)x^2+(4a-b)x+(3c-a) =>2b+3c=0,4a-b=1,3c-a=0 =>a=2/9,b=-1/9...
(a) 1-α= 0.98 α= 0.02 α/2 = 0.01 n = (Z 0.01)^2 * pq / e^2 p = q = 1/2 時, pq最大 , 此時 n = (Z 0.01)^2 * (1/2)(1/2) / e^2 = 2.326^2 * 0.25 / 0.06^2 ≒ 375.7 為使誤差小,需保守估計,取376 Ans: 376 (c) 1-α= 0.9 α= 0.1 α/2 = 0.05 p = 65/200 = 0.325 q = 1-p = 1-0.325 = 0.675 所求信賴區間 = 0.325± Z 0.05√(0.325...
ΔOAB: O=center, AB=water lineOA=OB=12cmAB=12√3cm∠AOB=120°=> ΔOAB=0.5*12*12*sin120°=36√3V(immerse)/V(circle)=(SemiCircle+ΔOAB)/Circle=(72π+36√3)/144π=(2π+√3)/4π...
