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Statistics

TermDefinition
Median A measure of center. It is the middle data value. To find the median, order the values from least to greatest, then find the middle value.
Mode A measure of center. Its the value that occurs the most often. A data set can have one mode, no mode, or more than one mode.
Mean A measure of center. The average of the data. To find the mean, add all of the data points and divide by the number of data points.
Means absolute deviation The average distance that the data points in a set of data are from the mean.
Inner Quartile Range The difference between the third quartile and the first quartile.
Outlier A data points that varies significantly from the rest of the data.
Skewed-left If the distribution has a long tail extending to the left, it is skewed to the left.
Skewed-Right If the distribution has a long tail extending to the right, it is skewed to the right.
Symmetrical The shape perfectly symmetric, because it can be divided into two halves (left and right half) that are mirror images of each other. They don't have to have perfect symmetry.
Bi-modal If the distribution has two modes or humps, it is bi-modal.
Uniform If the distribution of the data is all the same (or flat) it is a uniform distribution. No mode and also considered symmetrical.
Quartile 1 Median of First half of a box plot.
Quartile 3 Median of Second half of a box plot.
Probability The likelihood that an event will happen. (Number value or probability.)
Impossible Event(s) that will never happen.
Equally Probable/Equally Likely An event equally probable to happen or not happen falls exactly half way between impossible and certain.
Certain Event(s) that will definitely happen.
Unlikely An unlikely event has a probability between 0 and 1/2.
Likely A likely event has a probability between 1/2 and 1.
Sample Size Describes the number of data points collected in the sample.
Range The difference of the greatest value and the least value.
Complement The opposite of the event. It includes all the outcomes that are not apart of the original event.
Created by: user-1970005
 

 



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