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Probability & stats

TermDefinition
Sample Size describes the number of data points collected in the sample.
Mean The average of the data.
Median The middle data value.
Mode The value that occurs most often.
Range The difference of the greatest value and the least value in a data set.
Interquartile Range The difference between the third quartile and first quartile in a box plot.
Quartile 1 The median of the first half of a data set.
Quartile 3 The median of the second half of a data set.
Mean Absolute Deviation The average distance that the data points in a set of data are from the mean.
Outlier A data points that varies significantly from the rest of the data.
Symmetrical The shape perfectly symmetric, because it can be divided into two halves (a left half and a right half) that are mirror images of each other. They do not have to have perfect symmetry
Right Skewed The distribution has a long tail extending to the right, it is skewed to the right (or is right-skewed)
Left Skewed The distribution has a long tail extending to the left, it is skewed to the left (or is left skewed)
Bi-Modal If the distribution has two modes (or "humps"), it is bi-modal.
Uniform If the distribution of data is all the same (or flat) it is a uniform distribution. Uniform distributions have no mode and are also considered symmetrical.
Probability The likelihood than an event will happen.
Impossible When an event will never happen.
Certain When an event will definitely happen.
Equally Probable/Equally Likely When an event has a 50% percent chance of happening (in exactly the middle of certain and impossible)
Unlikely When an event has a 0 to 50% chance of happening.
Likely When an event has a 50 to 100% chance of happening.
Complement The opposite of a statistical event (includes all the outcomes that are not part of the original event)
Created by: user-1970340
 

 



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