The numerical value of the wilcoxon signed rank test

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Reference no: EM138159

1. A pediatrician is interested in studying the effect of Motrin on reducing temperature in young children. Four children with influenza have their temperatures taken immediately before and then 20 minutes after taking a standard dose of Motrin with the following results:

2370_The numerical value of the Wilcoxon signed rank test.png

The numerical value of the Wilcoxon signed rank test W+ computed on these data is

A. W⁺ = 1.
B. W⁺ = 11.
C. W⁺ = 25.

2. A researcher is interested in comparing SAT scores for students enrolled in public schools, private schools, and those home schooled. She selects a random sample of 20 high school students from each group and administers the SAT score to them. To see if the threshold sizes were systematically higher for some age groups than others, the data were ranked and the value of the Kruskal-Wallis statistic H = 4.72 was obtained. Using the chi-square approximation, the P-value for the test is

A. between 0.025 and 0.050.
B. between 0.050 and 0.100.
C. greater than 0.100.

Reference no: EM138159

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