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# Statistics

### Vocabulary for Statistics Unit Grade 7

TermDefinition
Absolute Deviation The distance a number is from a given point.
Biased Sampling A sampling that is not representative of a population because one or more parts of the population are favored over others.
Box Plot A data display that shows the distribution of a set of data in four quartiles.
Dot Plot A data display that not only shows the distribution or spread of data, but also shows the frequency of the data values.
Frequency A term used to describe how often something happens or appears.
Inference An implied conclusion about something.
Interquartile Range The difference between the upper and lower quartiles of a set of data.
Lower Quartile The median of the lower half of a data set; also called the first quartile.
Lower Extreme The lowest value in a data set; also called the minimum.
Mean Absolute Deviation The average distance that data points are from the mean of a data set.
Measures of Center The measures of the average or typical value of a data set.
Measures of Variability The measures of the distribution or spread of a data set.
Mean A measure of center that is found by taking the sum of all the data and dividing it by the number of values in the set of data.
Median The middle value of a set of data when the values are in numerical order.
Mode The most repeated value or values in a set of data.
Outlier A data value that is extremely "far off" from the majority of the data.
Population An entire group of people or objects.
Random Sampling A sampling where each member of the population is equally likely to be selected.
Range The difference between the highest and lowest values in a data set.
Sample A part of a population.
Upper Extreme The highest value in a data set; also called the maximum.
Upper Quartile The median of the upper half of a data set; also called the third quartile.
Created by: EYLERB106