Chapter 14 Graphical Representation of Data Flashcards Preview

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Flashcards in Chapter 14 Graphical Representation of Data Deck (16)
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1

Bar Chart

Chart in which (usually) the X-Axis represents a categorial variable and the Y-Axis can represent frequency, average, percentage etc.

2

Error Bar

On a bar chart, the vertical line at the top of each bar showing the possible range of error in measurements. The range represented can be +/- one standard deviation, +/- one standard error or a confidence interval for the mean

3

Line Chart

Chart joining continuous data points in a single line

4

Time Series

Line chart showing measures of a variable at progressive time intervals

5

Histogram

Chart containing whole of continuous data set divided into class intervals with each interval represented by a column proportional to a frequency in the interval

6

Frequency Polygon

Histogram showing only the peaks of class intervals

7

Exploratory Data Analysis

Close examination of data by a variety of means, including visual display, before submitting them to significance testing; recommended by Tukey

8

Stem and Leaf Chart

Exploratory data analysis tool showing every value in a data set but organised into class intervals to give a sideways histogram shape

9

Cumulative Frequency

Distribution (table or chart) that shows the number of cases that have occurred up to and including the current category

10

Box-Plot

Exploratory data chart showing median, central spread of data and position of relative extremes

11

Hinge Position

On a box-plot, the lower edge of the box where the first quartile falls and the upper edge where the third quartile falls

12

Lower Hinge

On a box-plot, the first quartile

13

Upper Hinge

On a box-plot, the third quartile

14

Hinge Spread

On a box-plot, the distance between the lower and upper hinges, i.e. the interquartile range (IQR)

15

Outer Fence

Extreme 'whisker' position on a box-plot being, for the lower fence, lower hinge - 1.5 X IQR, and for the upper fence, upper hinge + 1.5 X IQR. If there are no outliers then the fences are the maximum and minimum values.

16

Adjacent Value

On a box-plot the first value of the data set inside either of the outer fences, nearer to the median