7 terms

Topic 1: Statistical Analysis

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Statistics
how many data points do we need to develop an accurate representation of the overall data
Standard Deviation
a measurement of how data spreads around the mean
Standard deviation represents how much of the data within +/- 1 standard deviation of the mean?
68%
Standard deviation represents how much of the data within +/- 2 standard deviation of the mean?
95%
Random Sample
each thing must have an equal chance of being selected
T-Test
has two sets of data; more degrees of freedom (which strengthens the argument); and sees if chance played a role in the data results
Error Bar
graphical representation of the variability of data; used to show the range or standard deviation on a graph
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