# Shared Flashcard Set

## Details

Chapter 2
Descriptive Statistics: Tabular and Graphical Presentations
21
09/22/2012

Term
 Categorical Data
Definition
 Labels or names used to identify categories of like items.
Term
 Quantitative Data
Definition
 Numerical values that indicate how much or how many.
Term
 Relative Frequency Distribution
Definition
 A tabular summary of data showing the number (frequency) of data values in each of the several nonoverlapping classes.
Term
 Percent Frequency Distribution
Definition
 A tabular summary of data showing the percentage of data values in each of the several nonoverlapping classes.
Term
 Bar Chart
Definition
 Graphical device for depicting qualitative data that have been summarized in a frequency, relative frequency, or percent frequency distribution.
Term
 Pie Chart
Definition
 A graphical device for depicting qualitative data that have been summarized based on subdivision of a circle into sectors that correspond to the relative frequency for each class.
Term
 Class Midpoint
Definition
 The value halfway between the lower and upper class limits.
Term
 Dot Plot
Definition
 A graphical device that summarizes data by the number of dots above each data value on the horizontal axis.
Term
 Histogram
Definition
 A graphical presentation of a frequency distribution, relative frequency distribution, or percent frequency distribution of quantitative data constructed by placing the class intervals on the horizontal axis and the frequencies, relative frequencies, or percent frequencies on the vertical axis.
Term
 Cumulative Frequency Distribution
Definition
 A tabular summary of quantitative data showing the number of data values that are less than or equal to the upper class limit of each class.
Term
 Cumulative Relative Frequency Distribution
Definition
 A tabular summary of quantitative data showing the fraction or proportion of data values that are less than or equal to the upper class limit of each class.
Term
 Cumulative Percent Frequency Distribution
Definition
 A tabular summary of quantitative data showing the percentage of data values that are less than or equal to the upper class limit of each class.
Term
 Ogive
Definition
 A graph of cumulative distribution.
Term
 Exploratory Data Analysis
Definition
 Methods that use simple arithmetic and easy-to-draw graphs to summarize data quickly.
Term
 Stem-and-Leaf Display
Definition
 An exploratory data analysis technique that simultaneously rank orders quantitative data and provides insight about the shape of the distribution.
Term
 Crosstabulation
Definition
 A tabular summary of data for two variables. The classes for one variable are represented by the rows; the classes for the other variable are represented by the columns.
Term
Definition
 Conclusions drawn from two or more separate crosstabulations that can be reversed when the data are aggregated into a single corsstabulation.
Term
 Scatter Diagram
Definition
 A graphical Presentation of the relationship between two quantitative variables. One variable is shown on the horizontal axis and the other variable is shown on the vertical axis.
Term
 Trendline
Definition
 A line that provides an approximation of the relationship between two variable.
Term
 Relative Frequency (Equation)
Definition
 Frequency of the Class/n
Term
 Approximate Class Width (Equation)
Definition
 (Largest Data Value - Smallest Data Value)/Number of Classes
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