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A study where data is observed and measured, but subjects are not modified in any way
Observational Study

A study where some tratment is applied and the effects of the tratment in the subjects are recorded
Experiment

A measure of center found by adding the data values and dividing the total by the number of data values
Mean

A measure of center that is the middle calue when the original data values are arranged in order
Median

A measure of center that is the value of a data set that occurs the most
Mode

A measure of variation of values about the mean
Standard Deviation

The likelihood of an event's occurance expressed as a number between 0 and 1
Probability

A distribution with a graph that is sytemmetric and bellshaped
Normal Distribution

