Showing posts with label statistics. Show all posts
Showing posts with label statistics. Show all posts
Monday, February 4, 2013

Q: How accurate is Google Flu Trends?

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Update March 14, 2013: In 2012–13, Google Flu Trends did not successfully track the target flu indexes in the U.S., France, or Japan. Here ...
226 comments:
Friday, December 21, 2012

Q: The probability of success in each of a series of independent trials is constant. How can a 95% confidence interval for this proportion be obtained?

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This is called the "binomial confidence interval," and there are a few solutions. Wikipedia discusses this here:  Binomial proport...
9 comments:
Friday, November 30, 2012

Q: Event A has a probability of 70% of happening within the year and event B, 40%. The events are independent and uniformly distributed through the year. What is the probability that they will occur within 3 months of each other?

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There is more than one way to answer this question! The ambiguity comes down to exactly how we interpret the statement that "Events A...
2 comments:
Sunday, May 8, 2011

Q: Do the odds in a horse race add up to more than 100%?

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It doesn't quite make sense to sum odds. But if we talk about converting the odds into the probabilities of each horse's winning, th...
1 comment:
Wednesday, September 15, 2010

Q: In what ways are the US News & World Report rankings for colleges flawed?

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About a quarter of the U.S. News formula is an opinion poll of university administrators (presidents, provosts and deans) and high school co...
3 comments:
Sunday, June 13, 2010

Q: What is the difference between Bayesian and frequentist statistics?

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Mathematically speaking, frequentist and Bayesian methods differ in what they care about, and the kind of errors they're willing to acce...
16 comments: