It is common lore in the Adirondack mountain region of New York that Avon’s Skin So Soft hand lotion is a very effective repellant for black flies, Simulium venustum. To test this claim volunteers applied fixed amounts of a commercial repellant, N,N- diethyl-meta-toluamide (DEET) 20% (Treatment I), or Skin So Soft hand lotion (Treatment II) to their hand and arm, placing it in a chamber with 50 hungry black flies. The time until first bite in minutes is recorded below. Treatment I 5, 14, 6, 8, 8, 15, 13, 2 TreatmentII 3, 7, 10, 49, 2, 38, 6, 9 Are the repellants significantly different in their efficacy? Analyze using the Wilcoxon rank-sum test
It is common lore in the Adirondack mountain region of New York that Avon’s Skin So Soft hand lotion is a very effective repellant for black flies, Simulium venustum. To test this claim volunteers applied fixed amounts of a commercial repellant, N,N- diethyl-meta-toluamide (DEET) 20% (Treatment I), or Skin So Soft hand lotion (Treatment II) to their hand and arm, placing it in a chamber with 50 hungry black flies. The time until first bite in minutes is recorded below. Treatment I 5, 14, 6, 8, 8, 15, 13, 2 TreatmentII 3, 7, 10, 49, 2, 38, 6, 9 Are the repellants significantly different in their efficacy? Analyze using the Wilcoxon rank-sum test
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.1: Measures Of Center
Problem 9PPS
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It is common lore in the Adirondack mountain region of New York that Avon’s Skin So Soft hand lotion is a very effective repellant for black flies, Simulium venustum. To test this claim volunteers applied fixed amounts of a commercial repellant, N,N- diethyl-meta-toluamide (DEET) 20% (Treatment I), or Skin So Soft hand lotion (Treatment II) to their hand and arm, placing it in a chamber with 50 hungry black flies. The time until first bite in minutes is recorded below.
Treatment I 5, 14, 6, 8, 8, 15, 13, 2
TreatmentII 3, 7, 10, 49, 2, 38, 6, 9
Are the repellants significantly different in their efficacy? Analyze using the Wilcoxon rank-sum test.
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