Math Is Fun Forum
You are not logged in.
- Topics: Active | Unanswered
#26 2011-08-28 01:38:40
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Probability
That is right, very good. Of course you cannot get exactly 2.5 heads in 5 tosses. But it is an average, like the average number of kids per family is 2.3
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#27 2011-08-28 01:41:50
- zee-f
- Member
- Registered: 2011-05-12
- Posts: 1,220
Re: Probability
but cant it be 5*(2/5) and 5*(3/5) because the probability of throwing was 2/5 and 3/5 ?
One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3
Offline
#28 2011-08-28 01:44:04
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Probability
That was an empirical or experimentally derived probability. If you do not know the theoretical one then yes, use that. That is why you get it, to use it.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#29 2011-08-28 01:49:12
- zee-f
- Member
- Registered: 2011-05-12
- Posts: 1,220
Re: Probability
1. Flip a coin 5 times and record the outcomes here.
p(h)=3/5
p(t)= 2/5
2. Start again. Flip the coin 25 times and keep track of the outcomes. Record them here.
p(h)=15/25
p(t)=10/25
3. Verify that the sum of the experimental probabilities of flipping heads or tails add up to 1. Check both sets of your data. Show your work.
They do add up to one for my first one 3/5+2/5=1
15/25+10/25=1
did i solve these right ?
One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3
Offline
#30 2011-08-28 01:51:52
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Probability
Yes, that is correct.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#31 2011-08-28 01:55:22
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: Probability
That is right, very good. Of course you cannot get exactly 2.5 heads in 5 tosses. But it is an average, like the average number of kids per family is 2.3
like the average human has less than 2 legs.
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
Offline
#32 2011-08-28 02:08:16
- zee-f
- Member
- Registered: 2011-05-12
- Posts: 1,220
Re: Probability
4. Did you notice that your experimental data from question 2 was closer to the theoretical probability than your data from question 1? Explain briefly using your data to support your answer.
this is confuuuuuusing
One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3
Offline
#33 2011-08-28 02:10:58
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Probability
Hi anonimnystefy;
Yes, that is true.
Hi zee-f;
Didn't the second question have more throws?
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#34 2011-08-28 02:15:26
- zee-f
- Member
- Registered: 2011-05-12
- Posts: 1,220
Re: Probability
hi bobbym
yup the second one had more throws
One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3
Offline
#35 2011-08-28 02:20:40
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Probability
So would you not expect it to be a better predictor of the real probability of 1 / 2?
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#36 2011-08-28 02:50:53
- zee-f
- Member
- Registered: 2011-05-12
- Posts: 1,220
Re: Probability
better predictor؟؟
One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3
Offline
#37 2011-08-28 02:53:59
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Probability
Sorry, a little to advanced for just this second.
Question 4) just asks you to observe something. It does not ask you to draw any conclusions. So what do you observe when you toss the coin more times?
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#38 2011-08-28 03:11:02
- zee-f
- Member
- Registered: 2011-05-12
- Posts: 1,220
Re: Probability
when i toss the coin more times the closer the experimental probability is to the theoretical probability.
One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3
Offline
#39 2011-08-28 03:13:30
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Probability
That is what I would say too.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#40 2011-08-28 03:16:38
- zee-f
- Member
- Registered: 2011-05-12
- Posts: 1,220
Re: Probability
shouldn't i explain more ?
One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3
Offline
#41 2011-08-28 03:17:51
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Probability
What is their to explain? You do not yet know why that is true.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#42 2011-08-28 03:17:53
- zee-f
- Member
- Registered: 2011-05-12
- Posts: 1,220
Re: Probability
like it says Explain briefly using your data to support your answer like what should i add
One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3
Offline
#43 2011-08-28 03:18:49
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Probability
Hi;
See post #41.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#44 2011-08-28 03:28:28
- zee-f
- Member
- Registered: 2011-05-12
- Posts: 1,220
Re: Probability
so does this look correct
4. Did you notice that your experimental data from question 2 was closer to the theoretical probability than your data from question 1? Explain briefly using your data to support your answer.
4. yes because when i toss the coin more times the closer the experimental probability is to the theoretical probability.
One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3
Offline
#45 2011-08-28 03:29:16
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Probability
There are asking also for your data.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#46 2011-08-28 07:43:04
- zee-f
- Member
- Registered: 2011-05-12
- Posts: 1,220
Re: Probability
for question one 2/5=40% and 3/5=60%
and for question 2 15/25=60% and 10/25=40%
One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3
Offline
#47 2011-08-28 07:44:33
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Probability
Did you toss the coin yourself? If so I suggest you toss question 2 again.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#48 2011-08-28 08:03:10
- zee-f
- Member
- Registered: 2011-05-12
- Posts: 1,220
Re: Probability
yup i did toss it myself ok ill do it again
One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3
Offline
#49 2011-08-28 08:09:59
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Probability
Okay and be accurate. Let me know what you get!
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
Offline
#50 2011-08-28 08:10:25
- zee-f
- Member
- Registered: 2011-05-12
- Posts: 1,220
Re: Probability
so i tossed it i got p(h)=12/25= 48% p(t)=13/25= 52%
One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3
Offline