Search found 6 matches

by FixMyIgnorance
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...
by FixMyIgnorance
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...
by FixMyIgnorance
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...
by FixMyIgnorance
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...
by FixMyIgnorance
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
by FixMyIgnorance
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...

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