Statistics/Data Analysis
by
Kate Makris
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Line Graph
Continuous Data
time usually marked on horizontal axis
Shows trends in a variable over time
how data values change over time
What the graph needs?
Used to see a "trend" between two variables
Scatterplot
relationship between two sets of data
What graph needs?
Mean
Median
Mode
IQR
Standard Deviation/Variance
Range
Pictograph (RL)
Used to represent tellies of categories.
Dot Plot (RL)
Provides a quick and simple way of organizing numerical data.
Numerical data
A horizontal number line on which each score is represented by a dot, or an x above the corresponding number-line value
Outlier
Cluster
Gap
Mode
Bar Graphs
All the parts of a graph: (RL) http://www.beaconlearningcenter.com/weblessons/alltheparts/default.htm
Frequency Table (RL)
Shows how many times data occurs in a range.
Characteristics
New node
Bar Graph
Daniel Gomez
EXAMPLE
What is a Bar Graph used for?
(Categorical Data)
To compare numbers of data items in grouped categories; order of data does not matter except for convenience.
Parts of a Bar Graph
Circle Graph
Daniel Gomez
EXAMPLE
What is a Circle Graph?
A graph which consists of a circular region partitioned into disjoint sections, with each section representing a part or piece of the whole.
What is a Circle Graph used for?
(Categorical Data)
To show the division of a whole into parts.
Parts of a Circle Graph
Histogram
Daniel Gomez
EXAMPLE
What is a Histogram?
A diagram consisting of rectangles whose area is proportional to the
frequency of a variable and whose width is equal to the class interval.
What is a Histogram used for?
(Numerical Data)
To compare numbers of data items grouped in numerical intervals; order matters in the data depicted.
Parts of a Histogram
Abuse of Statistics (KM, AG)
Reported Statistics-DG
Misleading Graphs
Misuse of Mean, Median, and Mode
Statistics are used to display information and are commonly abused.
Stem and Leaf Plot
Used to show each value in a data set and group values.
What the graph needs?
New node
