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Statistics
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Key Concepts:
Terms in this set (22)
Dot Plot
a graphical display of data using dots
Range
the difference between the lowest and highest value
Quartiles
the values that divide a list of numbers into quarters
Five Number Summary
a set of data showing the Minimum, 1st Quartile, Median, 3rd Quartile, and Maximum numbers
Box Plot
a visual display of the Five Number Summary
Data
a collection of facts, such as numbers, words, measurements, observations or even just a description
Measures of Central Tendency
mean, median, mode
Mean
the average of a group of numbers (add up all numbers, then divide by the # of numbers added together)
Median
the middle number in a group of numbers (when ordered least to greatest)
Sample
a selection taken from a larger group
Population
the whole group from which a sample is taken
Variation
how far a set of numbers is spread out
Interquartile Range
the difference between Quartile 1 (Q1) and Quartile 3 (Q3)
Standard Deviation
measure of how spread out numbers are
Quantitative Data
data that can be counted and measured (amount, quantity)
Qualitative Data
data that describes something (quality)
Categorical Data
data that has been grouped together
Bivariate Data
data for two variables (ex. ice cream sales vs. temperature)
Scatterplot
a graph of plotted points that shows a relationship between 2 sets of data
Linear Regression
line of best fit
Line of Best Fit
a line on a graph showing the general direction that a group of points seems to be heading
Correlation
how things change together
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