9.6.1 The (Plot Details) Box Tab

See more related video:Box Plot

 Box Type Bar Type

Type

Choose from Box, Data, Box + Data Overlap, Box(Right) + Data(Left), Box(Left) + Data(Right), Bar, Bar + Data Overlap, Bar(Right) + Data(Left), Bar(Left) + Data(Right), Half Box(Right) + Data(Left) or Half Box(Left + Data(Right) in the Type drop-down List.

By default, the box chart displays only a Box - not the (binned) Data. You can display the box and binned data, or only the binned data. The binned data is saved in a Binn worksheet. This worksheet contains the bin centers, counts, cumulative sums, and cumulative probability.

To access the Binn worksheet, right-click on the box chart and select Go to Bin Worksheet from the shortcut menu.

Note that when you select a display that includes the binned data, the Plot Details Data tab becomes available for editing the bins and overlaying a distribution curve.

Box

Style No Box Box I-shaped Box: Just show horizontal lines for the box. Diamond Box: Show the box shape as a diamond. Notched Box: This is a useful variation of the box-and-whisker chart. Notches on the box represent the confidence interval about the median value. If notches of two box plots do not overlap, we can assume that the two median values differ at the 95% confidence level (McGill, R., J.W. Tukey, and W.A. Larsen. 1978. Variations of Box Plots. The American Statistician. 32. 12). 95% LCI of Median: Median - 1.58 * (IQR/sqrt(n)) 95% UCI of Median: Median + 1.58 * (IQR/sqrt(n)) SE (standard error) SD (standard deviation) Perc 25, 75 (25/75th percentiles), Perc 10, 25, 75, 90 (10/25/75/95th percentiles) Constant (value set in the Coef Combo Box) Custom Percentiles (The percentiles can be specified in the P combo box.) Note: When the box Style is set to No Box or Notched Box, the Range drop-down list will be grayed out . Select or type in a factor by which to expand the box (default is 1). This can be useful, for instance, in combination with the SD option in the Range drop-down list to show how data points are distributed within 2 or 3 standard deviations of the mean. Note: When the box Range is set to Perc 25, 75 and Perc 10, 25, 75, 90, the Coef combo box will be grayed out. Specify percentiles value for box range in this combo box. The P value can be set between 0 to 100. When it is set to 30, that means the box range is 30% to 70%. Note: P combo box is only available when Custom Percentile is selected in Range drop-down list. Specify whether to control the box width by the column label row in the source column. Choose the parameter in the Box Width(%) list. Select or type a factor to control the box width in the combo box. This is a percent and only values from 0 to 100 are acceptable. When the Box Width by Parameter check box is selected, the box width is controlled by the column label row listed in this drop-down. The parameters include: Long Name, Units, Comment, Sampling Interval and Parameter. Type or select a value by which to scale the associated parameters (default is 1). For example, select 0.25 to scale each parameter value by a factor of 1/4.

Whisker

 Range Use the Range drop-down list to determine the quantity displayed by the whiskers (or choose No Whiskers). Choose from No Whiskers, 10-90th, 5-95th, 1-99th, SD (standard deviation), SE (standard error), Outlier, Min-Max, Constant, Custom Percentiles or Confidence Interval. Specify percentiles value for whisker range in this combo box. The P value can be set between 0 to 100. When it is set to 30, that means the whisker range is 30% to 70%. Note: P combo box is only available when Custom Percentiles is selected in Range drop-down list. Specify the confidence levels for which the confidence intervals will be computed in this combo. Note: Probability combo box is only available when Confidence Interval is selected in Range drop-down list. Select or type a value n into the Coef combo box to expand the whisker by a factor of n.

Note that if you select Outlier from the Range drop-down list and accept the default Coef value of 1.5, whisker length will be determined by the outermost data point that falls within upper inner and lower inner fence (a Coef = 3 would be determined by the outermost data point that falls within the upper outer and lower outer fences).

Upper Inner Fence = 75th Percentile + (1.5 * Interquartile Range)

Lower Inner Fence = 25th Percentile - (1.5 * Interquartile Range)

Bar

 Represent Specify the value that the height of the bar represents. Choose from Mean, N(number of data), Median, Min, Max, Sum, SD (standard deviation), SE (standard error). Specify whether to control the box width by the column label row in the source column. Choose the parameter in the Box Width(%) list. Select or type a factor to control the box width in the combo box. This is a percent and only values from 0 to 100 are acceptable. When the Box Width by Parameter check box is selected, the box width is controlled by the column label row listed in this drop-down. The parameters include: Long Name, Units, Comment, Sampling Interval and Parameter. Type or select a value by which to scale the associated parameters (default is 1). For example, select 0.25 to scale each parameter value by a factor of 1/4.

Error Bar

 Range Use the Range drop-down list to determine the quantity displayed by the error bar (or choose None). Choose from None(no error bar), 10-90th, 5-95th, 1-99th, SD (standard deviation), SE (standard error), Outlier, Min-Max, Constant, Custom Percentiles or Confidence Interval. Specify percentiles value for error bar range in this combo box. The P value can be set between 0 to 100. When it is set to 30, that means the whisker range is 30% to 70%. Note: P combo box is only available when Custom Percentiles is selected in Range drop-down list. Specify the confidence levels for which the confidence intervals will be computed in this combo. Note: Probability combo box is only available when Confidence Interval is selected in Range drop-down list. Select or type a value n into the Coef combo box to expand the whisker by a factor of n. Specify how to show the error bar on the plot. Plus: show error bars above the top of data bar Minus: show error bars below the top of data bar Both: show error bars both above and below the top of the data bar

X Position

Specify whether link the X-axis to a real scale. By default, it set to Auto that does not link to the real axis scale. In this drop-down list, these column labels can choose as the parameter to control the scale: Long Name, Units, Comment, Sam

Draw Data On Top Of Box, Outliers, Outliers In Line

 Draw Data on Top of Box The data symbols will show on the top of the box. Note: This check box is available when the Box + Data Overlap is selected in the Type drop-down list. Data points that lie outside of the whiskers are considered to be outliers. Subsequently, selecting the Outliers check box will display these outliers with individual data points being represented using the settings on the Symbol tab. Specify whether the outliers of box plot align in a line in the center of the box plot.

Labels

 Box Show the labels of the top, the median and the bottom lines mext to the box plot. For example, when you select Perc 25, 75 from the Range list for Box, the labels for the 75th percentile, median and 25th percentile, will display in the graph. Show the label of upper and lower whisker next to the box plot. Show the label of mean next to the box plot. Note: This check box is not available when neither Mean Line check box on the Line tab nor Mean box on the Percentile tab is checked. Show the label of median next to the box plot. Note: This check box is not available when neither Median Line check box on the Line tab nor Median box on the Percentile tab is checked. Specify to show the Value, Percentile or both for the Box/Whisker/Mean Value Labels.

The labels format can be customized in the Label tab .