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Data Distribution Vocabulary
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Terms in this set (19)
box plot
a diagram of range, median, and interquartile range;
data set
a collection of numbers that answer a statistical question
distribution
the overall shape of data related to a statistical question; it can include normal distribution, or the data can be left or right sweked
line plot
a diagram that uses x's and a number line to show the values in a data set
histogram
a diagram of data grouped into ranges; each bar represents a range of data
interquartile range
the difference between the first quartile and the third quartile of a data set; it is a measure of range
mean absolute deviation
the average distance from the mean to the numbers in the data set
mean
the average of all of the values in the data set; is a measure of center
measure of center
a measurement that identifies a center of distribution in a data set; mean and median are good measures of center
median
the middle value in a data set that is arranged in ascending order; is a measure of center
mode
the number that appears most often in a data set
outlier
a number that is different from other numbers in the data set; it stands apart from the other data
first quartile
it is the middle number between the lower extreme (smallest number) and the median of a data set
third quartile
the middle number between the median and the upper extreme (largest number) of a data set
quartile
the values that divide a data set into quarters
range
the difference between the lowest value and the highest value in a data set
measure of spread
this describes how far from the center the numbers in a data set are; range, interquartile range, and mean absolute deviation (M.A.D.) are all measures of spread
statistical question
a question that has variability in the answer; examples: What is the age of each dog in the neighborhood?
skewed data distribution
the mean is too far to the right or left of the peak
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