Stats%20notes%209%3a9

# Stats%20notes%209%3a9 - Cannot perform a Mann-Whitney U...

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9/9/10 Example 2: One-way chi-square Observed Expected Light lagers 10 10.5 Lagers 12 10.5 Ales 13 10.5 Stouts/Porters 7 10.5 Total 42 H o : There will be no difference in the quantity of types of beers in the cooler. H 1 : There will be a difference in the quantity of types of beers in the cooler. There will be more lagers than other types of beers in the cooler If H o is true, we’d expect purchases to be evenly spread throughout categories. - A chi-square test is used to determine if 2 or more groups are different. o With a dependent variable measured on a nominal scale. Other non-parametric tests - A Mann-Whitney U Test is used to determine if 2 groups independent of each other are different. o with a dependent variable measured on an ordinal scale. o The groups must be independent of each other.

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Unformatted text preview: Cannot perform a Mann-Whitney U Test in Excel, must use SPSS. Go to: o Analyze-Nonparametric Tests • 2 Independent Samples Wilcoxon Matched Pairs Signed Rank Test o Use if the data are related. o Good for before-and-after studies. Cannot perform a Wilcoxon test in Excel, must use SPSS. Go to:-Analyze o Nonparametric tests 2 Related Samples Kruskal-Wallis Test o Use when you want to determine if there are differences among > 2 groups, and data are measures on an ordinal scale. o Groups should not be related Cannot perform a Kruskal-Wallis test in excel, we must use SPSS. Go To:-Analyze o Nonparametric Tests K Independent Samples...
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Stats%20notes%209%3a9 - Cannot perform a Mann-Whitney U...

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