F(t) =
0, t<1;
1/4, 1<=t<3;
1/2, 3<=t<5;
3/4, 5<=t<7;
1, t>=7
Find:
a. P (T>3)
b. P(1.4<t<6)
更新1:
b 應該係1/2 WO=.=
數學Probability問題 HELP=0=
2012-10-24 7:06 am
An investment firm offers its customers municipal bonds that mature after varying numbers of years. Given that the cumulative distribution of T, the number of years to maturity for a randomly selected bond is:
F(t) =
0, t<1;
1/4, 1<=t<3;
1/2, 3<=t<5;
3/4, 5<=t<7;
1, t>=7
Find:
a. P (T>3)
b. P(1.4<t<6)
F(t) =
0, t<1;
1/4, 1<=t<3;
1/2, 3<=t<5;
3/4, 5<=t<7;
1, t>=7
Find:
a. P (T>3)
b. P(1.4<t<6)
回答 (1)
2012-10-24 10:12 pm
✔ 最佳答案
Suggested solution(a) ccroding the structure of F(t), there is a jump at t = 1,3,5,7
P(T > 3) = 1 - F(3) = 1 - 1/2 = 1/2
(b) P(1.4 < T < 6)
= F(5) - F(3)
= 3/4 - 1/2
= 1/4
收錄日期: 2021-04-27 17:43:42
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https://hk.answers.yahoo.com/question/index?qid=20121023000051KK00783