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13 Cards in this Set
- Front
- Back
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Paramertic Statistics
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Involve numbers with known, continuous distribution. Appropriate when the data is interval or ratio scaled and when the sample size is large
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Nonparametric Statistics
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Appropriate when the variables being analyzed do not conform to any known or continuous distribution
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T-Test
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A hypothesis test that uses teh t-distribution. Univariate t-test is appropriate when the variable being analyzed is interval or ratio
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Degrees of Freedom
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The number of observations minus the number of constraints or assumptions needed to calculate a statistical term
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Nominal Variables
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Mutually exclusive but not ordered categories
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Ordinal Variable
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The order matters but not the diffirence between variables
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Interval Variable
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Measurment where the difference between two degrees is meaningful
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Ratio Variable
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Has all the properties of interval plus a clear definition of 0.0
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One-Tailed Test
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Appropriate when a research hypothesis implies that an observed mean can onlybe greater than or less than a hypothesized value
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Two-Tailed Test
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Tests for differences from the population mean that are iether greater or less. Extrememe values of the normal curve on both the right and left are considered. When a reaserch qeustion does not specify whether a difference should be greater than or less than, a two tailed test is most appropriate
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Chi Square Test
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Tests for statistical significance. Is particularly appropriate for testing hypotheses about frequencies arranged in a frequency or contingency table
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Goodness of Fit (GOF)
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A general term representing how well some computed table or matrix of values matches some population or predetermined table or matrix of the same size. More often than not the test is between a table of observed frequency counts and another table of expected values (central tendancy) for those counts
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Hypothesis Test of a proportion
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Conceptually similar to the one used when the mean is the characteristic of interest but that differs in the mathematical formation of the standard error of the proportion
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