A mixture of compounds called phenolics occurs in wood waste products. It has been found that when phenolics are present in large quantities that waste become unsuitable for use as a livestock feed. To compare two species of wood, a dairy scientist measures the percentage content of phenloics from 6 batches of waste of species A and 7 batches of waste of species B. The following data are obtained.

Use the Wilcoxon rank-sum test to determine if the phenolics content of species B is significantly higher than that of species A. Use a close to .05.

Transcribed Image Text:

Percentage of Phenolics Species A 2.38 419 1.39 3.73 2.86 1.21 Species B 4.67 5.38 3.89 4.67 3.58 4.96 3.98