Statistical Analysis Terms

the limits of the values a function can take
Line Graph
A graph that uses line segments to show changes that occur over time
Sample Size
The number of items in a sample; in general, a larger sample size yields better statistical information than a smaller sample size; large sample size can decrease the effect of random variation and make trends and predictions more accurate.
A group of statistics used to determine if a significance difference exists between the means of two sets of data.
a statistical relation between two or more variables such that systematic changes in the value of one variable are accompanied by systematic changes in the other
Statistical Analysis
performs such functions as information correlations, distributions, calculations, and variance analysis
Error Bars
Graphical Representation of the variability of data
The sum of a group of numbers divided by the number of numbers; also known as the average
A cause and effect relationship in which one variable controls the changes in another variable.
Degrees of Freedom
The number of values in the sample sets, minus 2.
Standard Deviation
a computed measure of how much scores vary around the mean score

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