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• Q–Q_plot abstract "In statistics, a Q–Q plot (\"Q\" stands for quantile) is a probability plot, which is a graphical method for comparing two probability distributions by plotting their quantiles against each other. First, the set of intervals for the quantiles is chosen. A point (x, y) on the plot corresponds to one of the quantiles of the second distribution (y-coordinate) plotted against the same quantile of the first distribution (x-coordinate). Thus the line is a parametric curve with the parameter which is the (number of the) interval for the quantile.If the two distributions being compared are similar, the points in the Q–Q plot will approximately lie on the line y = x. If the distributions are linearly related, the points in the Q–Q plot will approximately lie on a line, but not necessarily on the line y = x. Q–Q plots can also be used as a graphical means of estimating parameters in a location-scale family of distributions.A Q–Q plot is used to compare the shapes of distributions, providing a graphical view of how properties such as location, scale, and skewness are similar or different in the two distributions. Q–Q plots can be used to compare collections of data, or theoretical distributions. The use of Q–Q plots to compare two samples of data can be viewed as a non-parametric approach to comparing their underlying distributions. A Q–Q plot is generally a more powerful approach to do this than the common technique of comparing histograms of the two samples, but requires more skill to interpret. Q–Q plots are commonly used to compare a data set to a theoretical model. This can provide an assessment of \"goodness of fit\" that is graphical, rather than reducing to a numerical summary. Q–Q plots are also used to compare two theoretical distributions to each other. Since Q–Q plots compare distributions, there is no need for the values to be observed as pairs, as in a scatter plot, or even for the numbers of values in the two groups being compared to be equal.The term \"probability plot\" sometimes refers specifically to a Q–Q plot, sometimes to a more general class of plots, and sometimes to the less commonly used P–P plot. The probability plot correlation coefficient is a quantity derived from the idea of Q–Q plots, which measures the agreement of a fitted distribution with observed data and which is sometimes used as a means of fitting a distribution to data.".
• Q–Q_plot thumbnail Normal_exponential_qq.svg?width=300.
• Q–Q_plot wikiPageExternalLink probplot.htm.
• Q–Q_plot wikiPageExternalLink qqplot.
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• Q–Q_plot wikiPageID "4031859".
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• Q–Q_plot wikiPageRevisionID "697003051".
• Q–Q_plot wikiPageWikiLink Affine_transformation.
• Q–Q_plot wikiPageWikiLink Category:Statistical_charts_and_diagrams.
• Q–Q_plot wikiPageWikiLink Central_tendency.
• Q–Q_plot wikiPageWikiLink Chester_Ittner_Bliss.
• Q–Q_plot wikiPageWikiLink Cumulative_distribution_function.
• Q–Q_plot wikiPageWikiLink Generalized_least_squares.
• Q–Q_plot wikiPageWikiLink Histogram.
• Q–Q_plot wikiPageWikiLink Interpolation.
• Q–Q_plot wikiPageWikiLink List_of_graphical_methods.
• Q–Q_plot wikiPageWikiLink Location-scale_family.
• Q–Q_plot wikiPageWikiLink Median.
• Q–Q_plot wikiPageWikiLink Nonparametric_statistics.
• Q–Q_plot wikiPageWikiLink Normal_distribution.
• Q–Q_plot wikiPageWikiLink Normal_probability_plot.
• Q–Q_plot wikiPageWikiLink Order_statistic.
• Q–Q_plot wikiPageWikiLink Parametric_equation.
• Q–Q_plot wikiPageWikiLink Pearson_product-moment_correlation_coefficient.
• Q–Q_plot wikiPageWikiLink Probability_distribution.
• Q–Q_plot wikiPageWikiLink Probability_plot.
• Q–Q_plot wikiPageWikiLink Probability_plot_correlation_coefficient_plot.
• Q–Q_plot wikiPageWikiLink Probit.
• Q–Q_plot wikiPageWikiLink P–P_plot.
• Q–Q_plot wikiPageWikiLink Quantile.
• Q–Q_plot wikiPageWikiLink Quantile_function.
• Q–Q_plot wikiPageWikiLink Rankit.
• Q–Q_plot wikiPageWikiLink Scatter_plot.
• Q–Q_plot wikiPageWikiLink Shapiro–Wilk_test.
• Q–Q_plot wikiPageWikiLink Skewness.
• Q–Q_plot wikiPageWikiLink Slope.
• Q–Q_plot wikiPageWikiLink Statistical_dispersion.
• Q–Q_plot wikiPageWikiLink Statistical_population.
• Q–Q_plot wikiPageWikiLink Symmetry.
• Q–Q_plot wikiPageWikiLink Uniform_distribution_(continuous).
• Q–Q_plot wikiPageWikiLink Y-intercept.
• Q–Q_plot wikiPageWikiLink File:Normal_exponential_qq.svg.
• Q–Q_plot wikiPageWikiLink File:Normal_normal_qq.svg.
• Q–Q_plot wikiPageWikiLink File:Ohio_temps_qq.svg.
• Q–Q_plot wikiPageWikiLink File:State_Route_20.png.
• Q–Q_plot wikiPageWikiLink File:Weibull_qq.svg.
• Q–Q_plot wikiPageWikiLinkText "Q–Q plot".
• Q–Q_plot wikiPageWikiLinkText "Q–Q plot#Plotting positions".
• Q–Q_plot wikiPageWikiLinkText "Q–Q".
• Q–Q_plot wikiPageWikiLinkText "normal quantile plot".
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• Q–Q_plot wikiPageUsesTemplate Template:Math.
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• Q–Q_plot wikiPageUsesTemplate Template:Statistics.
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• Q–Q_plot subject Category:Statistical_charts_and_diagrams.
• Q–Q_plot hypernym Plot.
• Q–Q_plot type Place.
• Q–Q_plot type Chart.
• Q–Q_plot type Redirect.
• Q–Q_plot type Source.
• Q–Q_plot type Thing.
• Q–Q_plot comment "In statistics, a Q–Q plot (\"Q\" stands for quantile) is a probability plot, which is a graphical method for comparing two probability distributions by plotting their quantiles against each other. First, the set of intervals for the quantiles is chosen. A point (x, y) on the plot corresponds to one of the quantiles of the second distribution (y-coordinate) plotted against the same quantile of the first distribution (x-coordinate).".
• Q–Q_plot label "Q–Q plot".
• Q–Q_plot differentFrom P–P_plot.
• Q–Q_plot sameAs Q378347.
• Q–Q_plot sameAs Quantile-Quantile-Plot.
• Q–Q_plot sameAs Gráfico_Q-Q.
• Q–Q_plot sameAs نمودار_Q-Q.
• Q–Q_plot sameAs Diagramme_Quantile-Quantile.
• Q–Q_plot sameAs תרשים_Q-Q.
• Q–Q_plot sameAs Q-Q_plot.
• Q–Q_plot sameAs m.0bdg_m.
• Q–Q_plot sameAs Графік_Q-Q.
• Q–Q_plot sameAs Q378347.
• Q–Q_plot sameAs 分位圖.
• Q–Q_plot wasDerivedFrom Q–Q_plot?oldid=697003051.
• Q–Q_plot depiction Normal_exponential_qq.svg.
• Q–Q_plot isPrimaryTopicOf Q–Q_plot.