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Line chart showing the population of the town of Pushkin, Saint Petersburg from 1800 to 2010, measured at various intervals. A line chart or line graph, also known as curve chart, [1] is a type of chart that displays information as a series of data points called 'markers' connected by straight line segments. [2]
A trend line could simply be drawn by eye through a set of data points, but more properly their position and slope is calculated using statistical techniques like linear regression. Trend lines typically are straight lines, although some variations use higher degree polynomials depending on the degree of curvature desired in the line.
Ridgeline plot: Several line plots, vertically stacked and slightly overlapping. Q–Q plot : In statistics, a Q–Q plot (Q stands for quantile) is a graphical method for diagnosing differences between the probability distribution of a statistical population from which a random sample has been taken and a
The ACT (/ eɪ s iː t iː /; originally an abbreviation of American College Testing) [10] is a standardized test used for college admissions in the United States. It is administered by ACT, Inc., a for-profit organization of the same name. [10] The ACT test covers four academic skill areas: English, mathematics, reading, and scientific ...
Whereas statistics and data analysis procedures generally yield their output in numeric or tabular form, graphical techniques allow such results to be displayed in some sort of pictorial form. They include plots such as scatter plots , histograms , probability plots , spaghetti plots , residual plots, box plots , block plots and biplots .
Hence the terms straight line and right line were used to distinguish what are today called lines from curved lines. For example, in Book I of Euclid's Elements , a line is defined as a "breadthless length" (Def. 2), while a straight line is defined as "a line that lies evenly with the points on itself" (Def. 4).
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PLAN test booklets. The PLAN assessment was a preliminary ACT test from ACT, Inc. that was generally administered in the sophomore year. [1] The PLAN test was scored between 1 and 32 and was determined by a composite scoring system much like that of the ACT, based on the scores received on each of the categories of the test.