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# Statistics

TermDefinition
standard deviation is a measure that is used to quantify the amount of variation or spread there is in a set of data, specifically from the mean
mean add up all the numbers in the data and divide by the total number of data
median (2nd quartile) the number that falls within the middle of the data when the data is organized from least to greatest
mode the number that appears most frequently
range the spread of data (subtract the largest number and the smallest number)
1st quartile the median of the lower half of data
3rd quartile the median of the upper half of data
interquartile range subtract Q3 and Q1
skewed data are symmetrical and have data that clusters toward one end
outlier is an observation point that is distant from other observations
dot plots a plot of each data value on a scale or number line
histograms a graph of data that groups the data based on intervals and represents the data in each interval by a bar
box plots a graph that provides a picture of the data ordered and divided into four intervals that each contains approximately 25% of the data
statistics is the study of numerical data
When data has an outlier or skewed, the _________ best represents the data. median
When data is not skewed or does not have an outlier, the _________ best represents the data. mean
Created by: KRago