精華區beta NTU-Exam 關於我們 聯絡資訊
課程名稱︰微積分乙下 課程性質︰系必修 課程教師︰王振男 開課學院:醫學院 開課系所︰醫學系 考試日期(年月日)︰2013/6/4 考試時限(分鐘):30分鐘 是否需發放獎勵金:是,謝謝 (如未明確表示,則不予發放) 試題: 1.(10%)Let X be a continuous random variable with probability density      function f(x). Find tje probabilty density function of X+a and aX      for nonzero a∈R. 2.(10%)Suppose the number of typos on a book page is Poisson distributed      with mean 0.1.    (a) Find the probabilty that there are no typos on a page.    (b) How many pages with typos do you expect in a 200-page book? 答案: 1.(a) f_Y1(y1)=f(y1-a) (b) f_Y2(y2)=(1/a)f(y2/a) 2.(a) exp(-0.1)  (b) 200[1-exp(-0.1)] -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.112.240.103