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Sample size determination or estimation is the act of choosing the number of observations or replicates to include in a statistical sample. The sample size is an important feature of any empirical study in which the goal is to make inferences about a population from a sample. In practice, the sample size used in a study is usually determined ...
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 than t boxes need to be bought ...
PASS is a computer program for estimating sample size or determining the power of a statistical test or confidence interval. NCSS LLC is the company that produces PASS. NCSS LLC also produces NCSS (for statistical analysis). PASS includes over 920 documented sample size and power procedures. Major statistical topics in PASS. Means - 1 or 2 Groups
Math students have a love-hate relationship with the funky, expensive TI-84 graphing calculators, but thanks to a new deal, they'll soon get a free option.Starting this spring, pupils in 14 US ...
The X-15 was built by two manufacturers: North American Aviation was contracted for the airframe in November 1955, and Reaction Motors was contracted for building the engines in 1956. Like many X-series aircraft, the X-15 was designed to be carried aloft and drop launched from under the wing of a B-52 mother ship.
Reddit will grant “standard contributor” status (earning 90 cents per gold awarded) to those with at least 10 gold who received between 100 and 4,999 karma in the last 12 months.
Reddit has a warning for AI companies and other scrapers: play by our rules or get blocked. The company said in an update that it plans to update its Robots Exclusion Protocol (robots.txt file ...
Reddit is now joining the bandwagon by testing a new “official” badge. The company said it is testing these labels with a small set of profiles as proof of authenticity. The label appears like ...