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2. Coupon collector's problem - Wikipedia

   en.wikipedia.org/wiki/Coupon_collector's_problem

   Coupon collector's problem. In probability theory, the coupon collector's problem refers to mathematical analysis of "collect all coupons and win" contests. It asks the following question: if each box of a given product (e.g., breakfast cereals) contains a coupon, and there are n different types of coupons, what is the probability that more ...

3. Coupon - Wikipedia

   en.wikipedia.org/wiki/Coupon

   Coupon. In marketing, a coupon is a ticket or document that can be redeemed for a financial discount or rebate when purchasing a product . Customarily, coupons are issued by manufacturers of consumer packaged goods [1] or by retailers, to be used in retail stores as a part of sales promotions. They are often widely distributed through mail ...

4. Pearson correlation coefficient - Wikipedia

   en.wikipedia.org/wiki/Pearson_correlation...

   Pearson's correlation coefficient is the covariance of the two variables divided by the product of their standard deviations. The form of the definition involves a "product moment", that is, the mean (the first moment about the origin) of the product of the mean-adjusted random variables; hence the modifier product-moment in the name.

5. Probability-proportional-to-size sampling - Wikipedia

   en.wikipedia.org/wiki/Probability-proportional...

   The pps sampling results in a fixed sample size n (as opposed to Poisson sampling which is similar but results in a random sample size with expectancy of n). When selecting items with replacement the selection procedure is to just draw one item at a time (like getting n draws from a multinomial distribution with N elements, each with their own ...

6. How chip giant Intel spurned OpenAI and fell behind the times

   www.aol.com/news/chip-giant-intel-spurned-openai...

   Over several months in 2017 and 2018, executives at the two companies discussed various options, including Intel buying a 15% stake for $1 billion in cash, three of the people said.

7. Sales taxes in the United States - Wikipedia

   en.wikipedia.org/wiki/Sales_taxes_in_the_United...

   A 0.15% sales tax is imposed in Hennepin County to finance the Minnesota Twins' new Target Field. Several cities impose their own citywide sales tax: Minneapolis, Saint Paul, Rochester (all 0.5%), and Duluth (1%). These additional taxes increase the total general sales tax rates to 7.875% in Duluth, 7.775% in Minneapolis, 7.625% in Saint Paul ...