(New page: Given that a train arrives at a train station every hour (1:20, 2:20, 3:20 etc.) and that I go to the train station from 1:00 to 2:00 how much time do I wait? x= time I arrive y= wait tim...) |
|||
(6 intermediate revisions by 2 users not shown) | |||
Line 1: | Line 1: | ||
− | Given that a train arrives at a train station every hour (1:20, 2:20, 3:20 etc.) and that I go to the train station from 1:00 to 2:00 how much time do I wait? | + | [[Category:ECE302Fall2008_ProfSanghavi]] |
+ | [[Category:probabilities]] | ||
+ | [[Category:ECE302]] | ||
+ | [[Category:problem solving]] | ||
+ | =Question= | ||
+ | Given that a train arrives at a train station every hour (1:20, 2:20, 3:20 etc.) and that I go to the train station from 1:00 to 2:00 how much time do I wait? <BR><BR> | ||
− | + | =Answer= | |
− | + | If you go to the edit page you can see this better. I am not sure how to get wiki to show this the way I want it to. If you know how please feel free to fix it.<BR><BR> | |
− | + | x= time I arrive<BR> | |
− | + | y= wait time<BR><BR> | |
− | + | A={x<=1:20} P[A]=1/3<BR> | |
− | + | B={X>=1:20} P[B]=2/3<BR><BR> | |
− | fY/A | + | Theorem of Total Probability<BR> |
+ | fY(y)=fY/A(y)*P[A] + fY/B(y)*P[B]<BR><BR> | ||
− | |||
− | |||
− | |||
− | |||
− | |||
− | fY/B | + | fY/A<BR> |
− | | | + | |<BR> |
− | 2/3 | ______ | + | 3 |_____<BR> |
− | | | | | + | | |<BR> |
− | |____|______|______ | + | |_____|______<BR> |
− | 1/3 1 | + | 1/3<BR><BR> |
+ | |||
+ | fY/B<BR> | ||
+ | |<BR> | ||
+ | 2/3 | ______<BR> | ||
+ | | | |<BR> | ||
+ | |____|______|______<BR> | ||
+ | 1/3 1<BR><BR> | ||
Line 31: | Line 39: | ||
| | | | | | ||
|___________|______ | |___________|______ | ||
− | 1 | + | 1<BR><BR> |
+ | |||
+ | ---- | ||
+ | [[Main_Page_ECE302Fall2008sanghavi|Back to ECE302 Fall 2008 Prof. Sanghavi]] |
Latest revision as of 13:20, 22 November 2011
Question
Given that a train arrives at a train station every hour (1:20, 2:20, 3:20 etc.) and that I go to the train station from 1:00 to 2:00 how much time do I wait?
Answer
If you go to the edit page you can see this better. I am not sure how to get wiki to show this the way I want it to. If you know how please feel free to fix it.
x= time I arrive
y= wait time
A={x<=1:20} P[A]=1/3
B={X>=1:20} P[B]=2/3
Theorem of Total Probability
fY(y)=fY/A(y)*P[A] + fY/B(y)*P[B]
fY/A
|
3 |_____
| |
|_____|______
1/3
fY/B
|
2/3 | ______
| | |
|____|______|______
1/3 1
FY(y)
| 1 |___________ | | |___________|______ 1