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Data About Us

Attribute A characteristic or feature that is being investigated
Box-and-whisker plot A display that shows the distribution of values in a data set separated into four equal-size groups
Categorical data Non-numerical data sets. Example: Eye color, favorite book, month people are born
Cluster A group of numerical data values that are close to one another
Data Values such as counts, ratings, measurements, or opinions that are gathered to answer questions
Distribution The entire set of collected data values, organized to show their frequency of occurrence
Frequency table A table that lists all data values, and uses tally marks to show the number of times each data value occurs
Gap A value or several consecutive values, between the minimum and maximum observed data values, where no data value occurred
Histogram A display that shows the distribution of numeric data. The range of data values, divided into intervals, is displayed on the horizontal axis. The vertical axis shows the frequency in numbers or percents.
Interval A continuous group of numbers. Example: 0-5, 5-10, 10-15, 15-20
Line plot A way to organize data along a number line where the X's above a number represent how often each value is mentioned.
Maximum value The data item with the greatest value in the data set
Mean The value found when all the data are combined and then redistributed evenly. This value is calculated by finding the sum of all values and dividing by the number of values in the data set.
Median The middle number in an ordered set of data
Minimum value The data item with the least value in a data set
Mode The value that appears most frequently in a set of data
Numerical data Values that are numbers such as counts, measurements, and ratings. Example: Number of siblings, heart rate, height, number of texts sent per week
Outlier A value that lies far from the "center" of the distribution and is not like the other values. It is a data point that is much higher or much lower than the values that are normally expected in the data set
Range The difference between the maximum and minimum value in a data set
Skewed distribution Any distribution that is not symmetrical about the mean
Symmetric distribution A distribution in which the mean and median are the same or almost the same, and in which the values above and below the mean form an approximate mirror image
Table A tool for organizing information in rows and columns.
Variability An indication of how widely spread or closely clustered the data values are
Created by: vinborg