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)]
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