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measures of spread The range and the mean absolute deviation measure the spread for a set of data
median The middle number in a set of data when the data are arranged in numerical order. If the data has an even number, the median is the mean of the two middle numbers.
minimum value the lowest number in a data set
mode The number(s) or item(s) that appear most often in a set of data.
mutually exclusive Two or more events whose outcomes can never be the same.
outlier A number in a data set that is much lower or higher than the other values
range The difference between the greatest number and the least number in a set of data.
sample Some portion of a larger group selected to represent that group.
simple random sampling A sample that is chosen without any preference, representative of the entire population.
stem and leaf plot A display of data in which each piece of the data is separated into two numbers that are used to form a stem and a leaf.
box and whisker plot A diagram that divides a set of data into four parts using the median and quartiles.
frequency How often a piece of data occurs.
frequency table a table that shows the total for each category or group of data.
histogram A bar graph in which the data are organized into equal intervals. The height of the bar represents the frequency in that interval.
interquartile range The difference between the upper and lower quartiles representing the middle half of the data in the set.
maximum value the highest value in a data set
mean absolute deviation the average distance of each data item from the mean
mean The sum of the numbers in a set of data divided by the number of pieces of data in the set.
measures of center The mean and median measure the center for a set of data
Created by: tlindstrom
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