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3 posts tagged with math by storybored.

Displaying 1 through 3 of 3.

## Help finding beautiful science, math and music posters

Help me find beautiful posters with science, math or music as the subject. [more inside]

## The Math of Optimal Shopping Sprees

I need to spend at least $25 at the grocery store to claim a discount. I want to minimize how much I go over $25.
I have a list of a half a dozen items I want and their prices.
Is there a program that can generate shopping lists that would meet the criteria? I want more than just the optimal list because I can get this discount repeatedly and I don't want to buy the same thing each time.

## How do I interpret statistics from an ESP test?

How do I interpret the statistical results of an ESP test? At this ESP testing site there's a tabulation of the daily results of people from across the world attempting to guess which of 5 cards is a target card. In the results for 12/20/2005 the top scorer had 13 hits in 25 trials for a hit rate of 52%, random chance would be 0.20. Now the website says the odds against this are 2708 to 1. First question: is this correct? Second question: if it is correct, then how weird is this statistically speaking given that there were a total of 19,886 trials by 189 users.
[more inside]

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