## Search found 6 matches

- Tue Oct 09, 2012 1:19 pm UTC
- Forum: Individual XKCD Comic Threads
- Topic: 1118: "Microsoft"
- Replies:
**134** - Views:
**38911**

### Re: 1118: "Microsoft"

Can someone explain exactly what MS, Google, Facebook, and Apple are "guilty" of in this case? Is it fair to compare these companies? Microsoft tried to unfairly corner the market, but why is it unfair? Is it also fair for Apple/Google to buy up a bunch of silly patents? Did they try to un...

- Wed Oct 26, 2011 9:52 pm UTC
- Forum: Mathematics
- Topic: Probability question (subgroup versus whole group)
- Replies:
**7** - Views:
**1656**

### Re: Probability question (subgroup versus whole group)

Actually, another question comes to mind. Let's say I test the initial 80 and find that they're infected. The probability would no longer be 0 for the second group because it's possible that, say, everyone was infected. Let's say I want to know p(last 20 are infected) Would p(everyone in last 20 peo...

- Wed Oct 26, 2011 9:42 pm UTC
- Forum: Mathematics
- Topic: Probability question (subgroup versus whole group)
- Replies:
**7** - Views:
**1656**

### Re: Probability question (subgroup versus whole group)

Hmm I suspected it was a Bayesian problem at its core. I had tried it out but had solved P(A and B) incorrectly. Your P(A and B) basically says "All of S is OK and at least one person in the remaining N-S people is not," right? So let's say we had 100 people, infection rate 2%. I take a hu...

- Wed Oct 26, 2011 9:16 pm UTC
- Forum: Mathematics
- Topic: Probability question (subgroup versus whole group)
- Replies:
**7** - Views:
**1656**

### Probability question (subgroup versus whole group)

My brain is blanking out on me, here. Let's say the rate of infection is p. You have a group of N people, and you *know* that *at least* 1 is infected. If I take a random sample of S people (S<N), and test them to see if they're infected, what is the probability that those S people will NOT be infec...

- Fri Aug 19, 2011 4:40 am UTC
- Forum: Mathematics
- Topic: Weighted coin question and probability
- Replies:
**10** - Views:
**2143**

### Re: Weighted coin question and probability

Yes I know it would involve some sort of Bayesian probability or a null hypothesis test of sorts, but I never knew how to actually compute it

- Thu Aug 18, 2011 5:05 pm UTC
- Forum: Mathematics
- Topic: Weighted coin question and probability
- Replies:
**10** - Views:
**2143**

### Weighted coin question and probability

Disclaimer: I have already graduated from college -- this isn't a homework question. I have always been curious about this: Say I have a coin. I flip it, and it turns up heads. I flip it again -- heads. And again, heads. My question is how would we assess the "probability that this coin is weig...