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The sign test is a statistical test for consistent differences between pairs of observations, such as the weight of subjects before and after treatment. Given pairs of observations (such as weight pre- and post-treatment) for each subject, the sign test determines if one member of the pair (such as pre-treatment) tends to be greater than (or less than) the other member of the pair (such as ...
Quick, Draw! is an online guessing game developed and published by Google LLC that challenges players to draw a picture of an object or idea and then uses a neural network artificial intelligence to guess what the drawings represent. [2] [3] [4] The AI learns from each drawing, improving its ability to guess correctly in the future. [3]
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The five symbols are a hollow circle, a plus sign, three vertical wavy lines, a hollow square, and a hollow five-pointed star. [3]: 115 [4] In a test for ESP, the experimenter picks up a card in a shuffled pack, observes the symbol, and records the answer of the person being tested, who would guess which of the five designs is on the card.
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If X and Y are quantitative variables, the sign test can be used to test the hypothesis that the difference between the median of X and the median of Y is zero, assuming continuous distributions of the two random variables X and Y, in the situation when we can draw paired samples from X and Y. Distributions with equal medians: X is top and Y is ...
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