Can anyone help with these problems. I know the first four, just need help with the last 2 parts.

Kay listens to either classical or country music every day while she works. If she listens to classical music one day, there is a 63% chance that she will listen to country music the next day. If she listens to country music, there is a 73% that she will listen to classical music the next day.
If she listens to country music on Monday, what is the probability she will listen to classical music on Wednesday?

If she listens to classical on Monday, what is the probability she will listen to classical on Wednesday?

If she listens to classical music on Monday, what is the probability she will listen to country music on Thursday?

If she listens to country music on Monday, what is the probability she will listen to country music on Thursday?

Suppose you know that on a particular Monday the probability that she is listening to classical music is 0.35. What then is the probability she will be listening to country music on Wednesday?

Based on your knowledge that there is a 0.35 probability that she is listening to classical music on Monday, what then is the probability that she will be listening to classical music on Thursday?

12/5/2007 7:54:45 PM

i'm gonna do this for fun and see if i'm right

12/5/2007 8:01:05 PM

does .396 work for the first one you cant get...there are 2 ways she can listen to country if you do the tree...initial isnt .5/.5- instead its .35/.65

bout to do the second brb
fuck i drew my tree wrong gonna draw a new big one

[Edited on December 5, 2007 at 8:13 PM. Reason : .]

12/5/2007 8:09:35 PM

is .49501 the answer to the second one you cant get?

[Edited on December 5, 2007 at 8:18 PM. Reason : fuck i think i need to do one more row of my tree]

12/5/2007 8:16:24 PM

.48744 final answer for the first part

12/5/2007 8:27:51 PM

Thanks I got the first one right but the second one is still wrong. Since the question says thursday you go one more time than you did with the one before it which was on wednesday. Also could you tell me how you did this

12/5/2007 8:31:35 PM

i'm about to add it up

12/5/2007 8:36:03 PM

0.66186595 for the second part...i dont know how many extra submissions you got, but i dont have my calc, and i'm using the little calculator that comes with windows...i might have added .04346055 to it twice, so if that doesnt work try subtracting .04346055 from it and that should work

[Edited on December 5, 2007 at 8:40 PM. Reason : .]

12/5/2007 8:40:17 PM

neither one of those numbers worked

12/5/2007 8:43:39 PM

if you got the first 1 of the 2 you couldnt get, all you have to do is another level of the tree...what is fucking me up is that i dont have a calculator so i have to write the answers down and then click them in again

hold up i'll do it in ms paint...this is totally giving me something other than studyguide and news

12/5/2007 8:52:18 PM

12/5/2007 9:14:19 PM

try setting this up as a 2x2 matrix and multiply by the initial probability distribution.

The matrix looks like:
T = [.37, .63
.73, .27]

your initial probability distribution is:

p = [.36, .64]

for wednesday, you would multiply by T^2, for thursday it would be T^3. use the matrix tool.

[Edited on December 6, 2007 at 4:25 PM. Reason : .]

12/6/2007 4:22:50 PM

Thanks that was what i needed.

12/6/2007 10:50:29 PM

LOL at this thread

^^gg


^^^nice try

12/7/2007 7:01:07 PM

I hated this class!

What was the name of those stupid things I'll never care about again that you learn at the end of the class?

[Edited on December 7, 2007 at 7:13 PM. Reason : Thank God I took this one over in summer session.]

12/7/2007 7:13:34 PM

Markov Chains. I'm in the online section. I wouldn't recommend it. But I did get a 92 on the last test and the class average was 69, so I guess the countless hours I put into it are actually paying off.

12/7/2007 8:02:36 PM

my teacher sucks

12/8/2007 9:21:24 PM

you know, a lot of teachers read these forums.

12/8/2007 11:04:13 PM

markov chains are used all the time for cool shit

12/9/2007 4:33:40 AM