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example_SRST

# example_SRST - Stat 2225 Handout Example of Wilcoxon Signed...

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Stat 2225 Handout Example of Wilcoxon Signed Rank Sum Test Q17.55 on p. 584. Male Female frequency 28 30 32 34 36 38 (X 1000) 8 4 0 4 8 Histogram Male-Female frequency -2 -1 0 1 2 (X 1000) 0 1 2 3 4 5 6 Hypothesis Tests for Male-Female Sample mean = -206.6 Sample median = -623.0 t-test ------ Null hypothesis: mean = 0.0 Alternative: not equal Computed t statistic = -0.823968 P-Value = 0.418071 Do not reject the null hypothesis for alpha = 0.05. sign test --------- Null hypothesis: median = 0.0 Alternative: not equal Number of values below hypothesized median: 16 Number of values above hypothesized median: 9 Large sample test statistic = 1.2 (continuity correction applied) P-Value = 0.230139 Do not reject the null hypothesis for alpha = 0.05. Page 1 of 2

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signed rank test ---------------- Null hypothesis: median = 0.0 Alternative: not equal Average rank of values below hypothesized median: 11.875 Average rank of values above hypothesized median: 15.0 Large sample test statistic = 0.726487 (continuity correction applied) P-Value = 0.467538 Do not reject the null hypothesis for alpha = 0.05.
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