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13 Cards in this Set
- Front
- Back
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mean |
average of the sample; all values of a distribution of responses are summed and divided by number of valid responses |
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median |
middle value of rank ordered distribution |
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mode |
most common value in the set of responses to a question |
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range |
distance between smallest and largest values in a set of responses |
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standard deviation |
average distance of the distribution values from the mean |
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variance |
the average squared deviation about the mean of a distribution of values |
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chi-square (x^2) analysis |
assesses how closely the observed frequencies fit the patter of the expected frequencies and is referred to as a "goodness-of-fit" test |
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independent samples |
two or more groups of responses that are tested as though they may come from different populations |
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related samples |
two or more groups of responses that originated from the sample population |
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t-test |
hypothesis test that utilizes the t distribution; used when sample size is smaller than 30 and standard deviation is unknown |
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analysis of variance (ANOVA) |
statstical technique that determines whether three or more means are statistically different from one another |
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f-test |
test used to statistically evaluate the differences between the group means in ANOVA |
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follow-up tests |
test that flags the means that are statistically different from each other; performed after an ANOVA determines there are differences between means |
