Factbites
 Where results make sense
About us   |   Why use us?   |   Reviews   |   PR   |   Contact us  

Topic: Box plot


Related Topics

In the News (Mon 7 Dec 09)

  
  1.3.3.7. Box Plot
Calculate the median and the quartiles (the lower quartile is the 25th percentile and the upper quartile is the 75th percentile).
Plot a symbol at the median (or draw a line) and draw a box (hence the name--box plot) between the lower and upper quartiles; this box represents the middle 50% of the data--the "body" of the data.
Plot a symbol at the median and draw a box between the lower and upper quartiles.
www.itl.nist.gov /div898/handbook/eda/section3/boxplot.htm   (542 words)

  
 Box Plot
This attribute can be named in a bucket that is dropped on the box plot or can be one of the states of a component that is dropped on the box plot.
If a bucket is dropped on the box plot then the bin controls for the box plot are those of the bucket.
If a component is dropped on the box plot then there is a hidden bucket associated with the box plot and the bin controls are associated with the box plot and are accessible from the box plot control panel.
www.asu.edu /it/fyi/dst/helpdocs/statistics/sas/sasdoc/sashtml/qsim/chap2/sect18.htm   (184 words)

  
 NationMaster - Encyclopedia: Box plot
Indicate where the median lies inside of the box with the presence of a symbol or a line dividing the box at the median value.
Indicate where the smallest value that is not an outlier is by a vertical tic mark or "whisker", and connect the whisker to the box via a horizontal line.
There are alternative implementations of this detail of the box plot in various software packages, such as the whiskers extending to at most the 5th and 95th (or some more extreme) percentiles.
www.nationmaster.com /encyclopedia/Box-plot   (1610 words)

  
 Box and Whisker Plot Diagram in Excel
Box and Whisker Plot diagrams are used to analyze variation and central tendency of data due to time, parts, and production tools.
The box shows the 2nd and 3rd quartiles of the data (center).
Box and Whisker Plot Diagram showing variation among devices.
www.qimacros.com /qiwizard/box-whisker-plot.html   (188 words)

  
 Show me the data!
The top and bottom of the box are defined by the 75-th and 25-th percentiles of the data.
However, the box plots make it easy to compare medians and quartiles, and they are indispensible when displaying large data sets.
Printing a box plot on top of a dot plot has the potential to give the benefits of both displays.
www.tufts.edu /~gdallal/plots.htm   (1037 words)

  
 Box plots - Introduction
A box plot is a way of summarizing a set of data measured on an interval scale.
Box plots are also very useful when large numbers of observations are involved and when two or more data sets are being compared.
The significance of the box plot is that it is not strongly influenced by the outliers.
www.resample.com /xlminer/help/Boxplot/Box_Intro.htm   (598 words)

  
 1.5 Exploratory Data Analysis (EDA)
A small rectangular box is drawn with a line representing the median, while the top and bottom of the box represent the 75th and 25th percentiles (3rd and 1st quartiles), respectively.
Box plots easily represent the interquartile range as the distance between the top and bottom edges of the box.
Box and whisker plots represent more completely the range of values in the data by extending vertical lines to the largest and smallest values that are not outliers, extending short horizontal segments from these lines to make more apparent the values beyond which outliers begin (see Figure above).
www.uth.tmc.edu /uth_orgs/educ_dev/oser/L1_5.HTM   (935 words)

  
 Box Plots   (Site not responding. Last check: )
(We encountered a simplified form of box plots in the introduction to this chapter.) Box plots are useful for identifying outliers and for comparing distributions.
For example, the box plot in Figure 5 is constructed from our data but differs from the previous box plot in several ways.
The box for the women is wider than the box for the men because the widths of the boxes are proportional to the number of subjects of each gender (31 women and 16 men).
psych.rice.edu /notestat/chapter2/boxplots.html   (774 words)

  
 LMVP - Help with Box Plots
The box plot for this data has the median line in the middle of the box and the minimum and maximum lines extend equal distances from the box.
When we compare the box plot for Example 2 to the box plot for Example 1 we see two indications that the data was skewed: 1) the vertical line identifying the maximum is longer than the minimum line, and 2) the box extends higher above the median line than it does below.
Comparison of this box plot to Example 1 shows that the plots are the same with the exception of the median line.
www.lmvp.org /boxplots.htm   (668 words)

  
 Box Plot (1 of 2)   (Site not responding. Last check: )
The box stretches from the lower hinge (defined as the 25th percentile) to the upper hinge (the 75th percentile) and therefore contains the middle half of the scores in the distribution.
Therefore 1/4 of the distribution is between this line and the top of the box and 1/4 of the distribution is between this line and the bottom of the box.
For the data plotted in the figure, the minimum value is above the lower inner fence and is therefore the lower adjacent value.
davidmlane.com /hyperstat/A37797.html   (210 words)

  
 [No title]
The "bar deviation" plot is similar to the Bar X plot, in that individual data points are represented by vertical bars, however, the bars connect the data points to a user-selectable baseline.
In Box Plots (this term was first used by Tukey, 1970), ranges or distribution characteristics of values of a selected variable (or variables) are plotted separately for groups of cases defined by values of a categorical (grouping) variable.
In Box Plots (this term was first used by Tukey, 1970), ranges or distribution characteristics of values of selected variables are plotted separately for groups of cases defined by values of a categorical (grouping) variable.
www.statsoft.com /textbook/glosb.html   (3427 words)

  
 Notes on Boxplots
The box of the plot is a rectangle which encloses the middle half of the sample, with an end at each quartile.
The length of the box is thus the interquartile range of the sample.
The position of the box in its whiskers and the position of the line in the box also tells us whether the sample is symmetric or skewed, either to the right or left.
www.maths.murdoch.edu.au /units/statsnotes/samplestats/boxplot.html   (1219 words)

  
 New Page 0
In fact, even though the box plot does not directly contain the mean (it only shows the median) it is possible to estimate whether the mean is less than or greater than the median by looking whether the box plot is skewed to the left or to the right.
The box plot will look as if the box was shifted to the left so that the right tail will be longer, and the median will be closer to the left line of the box in the box plot.
Create a box plot for the data from each variable and decide, based on that box plot, whether the distribution of values is normal, skewed to the left, or skewed to the right, and estimate the value of the mean in relation to the median.
pirate.shu.edu /~wachsmut/Teaching/MATH1101/Descriptives/box.html   (1148 words)

  
 Learning Resources: Statistics: Power from Data! Box and whisker plots
It does not show a distribution in as much detail as a stem and leaf plot or histogram does, but is especially useful for indicating whether a distribution is skewed and whether there are potential unusual observations (outliers) in the data set.
Box and whisker plots are also very useful when large numbers of observations are involved and when two or more data sets are being compared.
Box and whisker plots are ideal for comparing distributions because the centre, spread and overall range are immediately apparent.
www.statcan.ca /english/edu/power/ch12/plots.htm   (719 words)

  
 Box Plots
Box plots are an effective way to compare distributions of interval data.
The (Y) in the Box Plot/Mosaic Plot (Y) menu indicates that a Y variable is required to create a box plot.
The label variable is used to identify extreme values in the box plot.
www.asu.edu /it/fyi/dst/helpdocs/statistics/sas/sasdoc/sashtml/insight/chap4/sect2.htm   (562 words)

  
 Jen's Box-and-Whisker Plot Instructions
A box-and-whisker plot can be useful for handling many data values.
Immediate visuals of a box-and-whisker plot are the center, the spread, and the overall range of distribution.
The first step in constructing a box-and-whisker plot is to first find the median, thelower quartile and the upper quartile of a given set of data.
ellerbruch.nmu.edu /cs255/jnord/boxplot.html   (420 words)

  
 Box plot Sample Data - Empire State College
Box plot Sample Data - Empire State College
Several of the case studies make use of Box plots.
You can use these case studies to learn how box plots are applied in the context of actual research.
www.esc.edu /smart/students/boxplot/boxplot_sampledata.html   (107 words)

  
 VisiCube Quantile/Box Plot   (Site not responding. Last check: )
The quantile plot shows the distribution of measurements while the companion box plot shows a statistical summary of that distribution.
The following is a plot of the petal lengths of all irises in a particular study.
In fact, there appear to be two distinct and separate sigmoids in the plot, a small one in the lower left and a larger one in the upper right.
www.datamology.com /sample-QB.shtml   (232 words)

  
 Box Plots
(We encountered a simplified form of box plots in the introduction to this chapter.) Box plots are useful for identifying outliers and for comparing distributions.
The box for the women is wider than the box for the men because the widths of the boxes are proportional to the number of subjects of each gender (31 women and 16 men).
Different styles of box plots are best for different situations, and there are no firm rules for which to use.
davidmlane.com /online_stat/chapter2/boxplots.html   (777 words)

  
 VOPlot 1.1
In the “Create new columns” Dialog Box, you can see the column names, UCD and their Id (used for expression building) and the expression with which they were created.
In this dialog box, you can see the column names, UCD and their Id (used for expression building) and the expression with which they were created.
The box plot shows how the data is distributed relative to the four points, namely the maximum value, the minimum value, the 25% quantile and the 75% quantile.
bima.astro.umd.edu /nemo/tvo/nvodemo2004/VOPlot_UserGuide_Version1_2.htm   (2549 words)

  
 Autodesk - AutoCAD - AutoCAD Q&A: Put a Plot Stamp On a Drawing   (Site not responding. Last check: )
Plot stamps, which are labels on plotted output that describe the drawing, are excellent for tracking paper drawings.
Plot stamps can also indicate who last worked on a file or the intended scale of the drawing.
The default location of the plot stamp is the lower-left corner of your plot in a horizontal orientation.
usa.autodesk.com /adsk/servlet/item?siteID=123112&id=2379074&linkID=2475176   (748 words)

  
 Box Plot: Display of Distribution
box and whisker diagram) is a standardized way of displaying the distribution of data based on the five number summary: minimum, first quartile, median, third quartile, and maximum.
On the other hand, a straightforward plot of the sample means and population standard deviations, suggests negative values (which prevents use of a log-scale) and broad overlap between the two distributions.
One case of particular concern --where a box plot can be deceptive-- is when the data are distributed into "two lumps" rather than the "one lump" cases we've considered so far.
www.physics.csbsju.edu /stats/box2.html   (745 words)

  
 Gri: box plots   (Site not responding. Last check: )
Box plots were invented by Tukey for eda (exploratory data analysis).
The centre of the box is the median.
Below is an example that uses a "new command" to define each box plot (see Adding New Commands).
gri.sourceforge.net /gridoc/html/BoxPlots.html   (110 words)

  
 Definition of Box plot
In descriptive statistics (also known as a box-and-whisker diagram), a box plot is a convenient way of graphically depicting the five-number summary, which consists of the smallest observation, lower quartile, median, upper quartile and largest observation.
The horizontal lines (the "whiskers") extend to at most 1.5 times the box width (the interquartile range) from either or both ends of the box.
There are alternative implementations of this detail of the box plot in various software packages, such as the whiskers extending to at most the 5th and 95th (or some more extreme) percentiles.
www.wordiq.com /definition/Box_plot   (330 words)

  
 Box and Whisker Plots in Origin
The box plot (sometimes called a box and whisker plot or box chart) is a graphical representation of key values from summary statistics.
Box plots are helpful in Quality Analysis for interpreting the distribution of data since it can easily show whether the data is skewed and if there are unusual observations (outliers) in the dataset.
Box plots are also very useful when large numbers of observations are involved and when two or more datasets are being compared.
www.originlab.com /index.aspx?s=8&lm=214&pid=959   (494 words)

  
 Box Plots and Box & Whiskers Plots
We will use what are called box plots to display some of the data.
Box plots are especially useful when the set of data points contains hundreds or thousands of data points.
To compare two or more sets of data using box plots, first look at the boxes to get an idea whether or not they are located in about the same place.
www.math.uncc.edu /~droyster/courses/spring00/maed3103/Box_Plots.htm   (749 words)

  
 The Graphical User Interface (Partial Differential Equation Toolbox)
A colorbar is added to the plots to map the colors in the plot to the magnitude of the property that is represented using color or contour lines.
A surface plot using the selected colormap and interpolated shading, i.e., each triangular area is colored using a linear, interpolated shading (the default).
Produces a "smooth" continuous plot by interpolating data from triangle midpoints to the mesh nodes (the default).
www.weizmann.ac.il /matlab/toolbox/pde/3gui10.html   (1328 words)

  
 VOPlot 1.3
To unselect points, drag the left mouse button down and to the right to draw a box, the data points that fall within the box area are not selected anymore.
In the "Create new virtual columns" Dialog Box, you can see the column names, UCD and their Id (used for expression building) and the expression with which they were created.
In this dialog box, you can see the column names, UCD and their Id (used for expression building) and the expression with which they were created.
vo.iucaa.ernet.in /~voi/voplot_1_3_user_guide/VOPlot_UserGuide_1_3.htm   (3279 words)

Try your search on: Qwika (all wikis)

Factbites
  About us   |   Why use us?   |   Reviews   |   Press   |   Contact us  
Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.