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AP Statistics - Lesson 1.2 Flashcards

from The Practice of Statistics, 4th edition, by Starnes, Yates, and Moore

Terms : Hide Images
555852884dotplotindividual values shown as a dot above its location on a number line - shows distribution of a quantitative variable
555852887overall patternshape, center, spread
555852888outlierindividual value that falls outside the overall pattern
555852892describing a distribution of quantitative dataS- shape O- outliers C- center S- spread
555870117shapeskewed/symmetrical and mode
555852889mode; modesmost frequent; major peaks
555870118centermedian or mean
555852890meanaverage
555901642medianthe middle value of a data set when numbers are arranged from least to greatest
555901643spreadhow much variability in the data, range
555901644rangehighest value minus smallest value
555852894skewed rightright side of the graph with larger values is longer than the left
555901645skewed leftleft side of the graph is much longer than the right side
555852893symmetricthe right and left sides of the graph are almost mirror images
555852895unimodalsingle peak
555852896bimodaltwo clear peaks
555852897multimodalmultiple peaks
555852885stemplotseparate each observation into a stem and a one-digit leaf; show distribution of a quantitative variable
555901646split stemsstem repeated twice: first line leaf values of 0-4, second line leaf values of 5-9; ex: 0 | 0 1 2 3 4 0 | 5 6 7 8 9
555901647back-to-back stemplotcompare two variables, share same stem, work out from center on both sides
555852886histogramplot the counts (frequencies) or percents (relative frequencies) of values in equal-width classes; shows distribution of a quantitative variable

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