 | Term | Definition |
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Probability |
A measure of the likelihood that an event will occur. |
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Counting Principle |
If one event can happen M ways and another event can happen N ways then the two events can happen in MN ways. |
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Tree Diagram |
A diagram that shows all of the possible arrangements of objects or outcomes of an event. |
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Measures of Central Tendency |
A single number that can represent a set of numbers. The mean, median, and mode of a set of numbers. |
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Mean |
The sum of a set of numbers divided by how many numbers are in the set. |
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Median |
The MIDDLE NUMBER (or average of two middle numbers) of a group of numbers listed in order. |
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Mode |
The number that occurs the most often in a set of data. |
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Stem and Leaf Plot |
A method of arranging data in increasing or decreasing order. |
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Box and Whisker Plot |
A graphical display that uses a box to represent the middle of a set of data and segments drawn to extremes on both ends. |
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Lower Extreme |
The smallest number in a data set (box & whisker). |
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Upper Extreme |
The largest number in a data set (box & whisker). |
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Lower Quartile |
The median of the lower half of data (box & whisker). |
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Upper Quartile |
The median of the upper half of data (box & whisker). |
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Interquartile Range |
The difference between the upper and lower quartiles. |
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Second Quartile |
The median of the data (box & whisker). |
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Range |
The difference between the upper and lower extremes. |
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Scatterplot |
A graph of a collection of ordered pairs that represent a real life situation. |
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Positive Correlation |
Data points on a scatterplot whose y-coordinates seem to increase as the x-coordinates increase. |
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Negative Correlation |
Data points on a scatterplot whose y-coordinates seem to decrease as the x-coordinates decrease. |
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No Correlation |
Data on a scatterplot for which no pattern exists between the x and y coordinates. |
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Bar Graph |
A graph that organizes a collection of data by horizontal or vertical bars to display how many times each event occurs. |
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Line Graph |
A graph that shows trends over time. |
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Circle Graph |
A graph that shows portions of data collections as part of a circular region. |
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Histogram |
A bar graph in which the bars represent equally spaced intervals of numbers. |
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Matrix |
A rectangular arrangement of numbers into horizontal and vertical rows and columns. |
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Element |
Each entry in a matrix. |
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