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Unit IXComparative Statistical Methods II:
2-Sample Tests
2-sample 2-test (>2 categories)2-sample z-test of proportions
1. Nominal Data
Mann-Whitney U-test2. Ordinal Data
a) paired samplesb) independent samples
Student’s t-test of means3. Interval/Ratio Data
9 2-Sample Tests Page 1
Nominal Data: 2-Sample 2 test
9 2-Sample Tests Page 2
9 2-Sample Tests Page 3
9 2-Sample Tests Page 4
Nominal Data: 2-Sample z-test of proportions
9 2-Sample Tests Page 5
9 2-Sample Tests Page 6
9 2-Sample Tests Page 7
Ordinal Data: Mann-Whitney U-test
9 2-Sample Tests Page 8
9 2-Sample Tests Page 9
9 2-Sample Tests Page 10
Ordinal Data: Mann-Whitney U-test (ties)
9 2-Sample Tests Page 11
9 2-Sample Tests Page 12
Interval/Ratio Data: Independent Samples t-test
9 2-Sample Tests Page 13
9 2-Sample Tests Page 14
Interval/Ratio Data: Paired Samples t-test
9 2-Sample Tests Page 15
9 2-Sample Tests Page 16