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Unit 6 math Vocabulary
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Terms in this set (18)
Box and Whisker Plot
A diagram that summarizes data using the median, the upper and lowers quartiles, and the extreme values (minimum and maximum). Box and whisker plots are also known as box plots. It is constructed from the five-number summary of the data: Minimum, Q1 (lower quartile), Q2 (median), Q3 (upper quartile), Maximum.
Distribution
The arrangement of values that show the spread of the data.
Dot Plot
A statistical chart consisting of data points on a number line, typically using circles.
Frequency
the number of times an item, number, or event occurs in a set of data.
Grouped Frequency Table
The organization of raw data in table form with classes and frequencies.
Histogram
a way of displaying numeric data using horizontal or vertical bars so that the height or length of the bars indicates frequency
Inter-Quartile Range (IQR)
The difference between the first and third quartiles. (Note that the first quartile and third quartiles are sometimes called upper and lower quartiles.)
Maximum value
The largest value in a set of data.
Mean Absolute Deviation
the average distance of each data value from the mean. The MAD is a gauge of "on average" how different the data values are form the mean value.
Mean
The "average" or "fair share" value for the data. The mean is also the balance point of the corresponding data distribution.
Measures of Center
The mean and the median are both ways to measure the center for a set of data.
Measures of Spread
The range and the Mean Absolute Deviation are both common ways to measure the spread for a set of data.
Median
The value for which half the numbers are larger and half are smaller. If there are two middle numbers, the median is the arithmetic mean of the two middle numbers. Note: The median is a good choice to represent the center of a distribution when the distribution is skewed or outliers are present.
Minimum value
The smallest value in a set of data.
Mode
The number that occurs the most often in a list. There can be more than one mode, or no mode.
Numerical Data
Consists of numbers only. Numerical data can be any rational numbers.
Outlier
An outlier is an observation that is numerically distant from the rest of the data.
Range
A measure of spread for a set of data. To find the range, subtract the smallest value from the largest value in a set of data.
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