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currency variable
A variable containing values of money.

Data editor
the main window in SPSS in which you enter data and carry out statistical functions.

Data view
there are two ways to view the contents of the data editor window. The data view shows you a spreadsheet and can be used for entering raw data.

Data variable
variables made up of dates. The data can take forms such as ddmmyyyy, ddmmmyy, mm/dd/yy etc.

Numeric variable
variables involving numbers

SmartViewer
a program that accompanies SPSS that enables output files to be viewed from preversion 16 editions of SPSS

String variable
variables involving words. Such variables could include responses to openended questions such as 'how much do you like writing glossary entries?'; the response might be 'about as much as I like placing my gonads on hot coals'.

Syntax editor
a window in SPSS for writing and editing syntax

Variable view
there are two ways to view the contents of the data editor window. The variable view allows you to define properties of the variables for which you wish to enter data

Viewer
SPSS window in which output of any analysis is displayed

Bar chart
a graph in which a summary statistic (ususally the mean) is plotted on the yaxis against a categorical variable on the xaxis (this categorical variable could represent, for example, groups of people, different times or different experimental conditions). The value of the mean for each category is shown by a bar. Differentcoloured bars may be used to represent levels of a second categorical variable.

Boxplot (boxwhisker plot)
a graphical representation of some important characteristics of a set of observations. At the centre of the plot is the median, which is surrounded by a box the top and bottom of which are the limits within which the middle 50% of observations fall (the interquartile range). Sticking out of the top and bottom of the two whiskers which extend to the most and least extreme scores respectively.

Chart Builder
facility in SPSS for drawing graphs that is accessed via the Graphs menu.

Chart Editor
a window in SPSS in which graphs from the SPSS Viewer can be edited. To access the chart editor window doubleclick on a graph in the viewer.

Chartjunk
superfluous material that distracts from the data being displayed on a graph.

Density plot
similar to a histogram except that rather than having a summary bar representing the frequency of scores, it show each individual score as a dot. They can be useful for looking at the shape of a distribution of scores.

Error bar chart
a graphical representation of the mean of a set of observations that includes the 95% confidence interval of the mean. The mean is usually represented as a circle, square or rectangle at the value of the mean (or a bar extending to the value of the mean). The confidence interval is represented by a line protruding from the mean (upwards, downwards or both) to a short horizontal line representing the limits of the confidence interval. Error bars scan be drawn using the standard error or standard deviation instead of the 95% confidence interval.

Line chart
a graph in which a summary statistic (usually the mean) is plotted on the yaxis against a categorical variable on the xaxis (this categorical variable could represent, for example, groups of people, different times or different experimental conditions). The value of the mean for each category is shown by a symbol and means across categories are connected by a line. Differentcoloured lines may be used to represent levels of a second categorical variable.

Outlier
an observation very different from most others. Outliers can bias statistics such as the mean.

Regression line
a line on a scatterplot representing the regression model of the relationship between the two variables plotted.

Scatterplot
a graph that plots values of one varible against the corresponding value of another variable (and the corresponding value of a third variable can also be included on a 3D scatterplot).

