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 Treatmentll 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 Treatmentll 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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Description: It is common lore in the Adirondack mountain region of NewYork that Avon's Skin So Soft hand lotion is a very effectiverepellant for black flies, Simulium venustum. To test this claimvolunteers applied fixed amounts of a commercial repellant,N,N- di

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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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.
A manufacturer of exercise equipment knows that 15% of their products aredefective. They also know that only 35% of their customers will actually use the equipment in the first year after it is purchased. If there is a one-year warranty on the equipment, what proportion of the customers will actually make a valid warranty claim?
The quality department at an electronics company has noted that, historically, 91% of the units of a specific product pass a test operation, 6% fail the test but are able to be repaired, and 3% fail the test and need to be scrapped. Due to recent process improvements, the quality department would like to test if the rates have changed. A recent sample of 500 parts revealed that 473 parts passed the test, 20 parts failed the test but were repairable, and 7 parts failed the test and were scrapped. (You may find it useful to reference the appropriate table: chi-square table or table)a. Choose the appropriate alternative hypothesis for the test.
To determine the effectiveness of an oil additive, a testing firm purchased two cars of the same make, year, and model, and drove each a distance of 30,000 miles using the same kind of gasoline, the same kind of oil, the same driver, under the same road conditions. The oil in one engine included the additive, whereas the oil in the other engine did not. At the end of the test, the engines of both cars were dismantled, and it was found that the engine that contained the additive had less wear. The testing firm concluded that the oil additive caused the reduced wear.
A purchaser of alarm clocks buys them in lots of size 10. It is his policy to inspect 3 clocks randomlyfrom a lot and to accept the lot only if all 3 are nondefective. If 30 percent of the lots have 4 defectiveclocks and 70 percent have only 1, what proportion of lots does the purchaser reject?
A Texas Garden Center wants to store leftover packets of vegetable seeds from their spring sale to have for their fall sale, but the center is concerned that the seeds may not germinate at the same rate six months later. The manager randomly selects a packet of green bean seeds remaining from the spring sale and plants them as a test. Although the packet claims a germination rate of 92% of the seeds, only 171 of the 200 test seeds sprout. Is this evidence that the seeds have lost viability during their six months in storage?
IN excel if possibleGreat Grasslands Grains, Inc. (GGG) manufactures and sells a wide variety of breakfast cereals. GGG’sproduct development lab recently created a new cereal that consists of rice flakes and banana-flavoredmarshmallows. The company’s marketing research department has tested the new cereal extensivelyand has found that consumers are enthusiastic about the cereal when 16-ounce boxes contain at least1.6 ounces and no more than 2.4 ounces of the banana-flavored marshmallows.As GGG prepares to begin producing and selling 16-ounce boxes of the new cereal, which it has namedGo Bananas management is concerned about the amount of banana-flavored marshmallows. It wants tobe careful not to include less than 1.6 ounces or more than 2.4 ounces of banana-flavoredmarshmallows in each 16-ounce box of Go Bananas. Tina Finkel, VP of Production for GGG, hassuggested that the company measure the weight of banana-flavored marshmallows in a random sampleof 25 boxes of Go Bananas on a weekly…
Bruce had a disagreement with a new federal agency set up to give additional funds for college to individuals with an aptitude for math. After a hearing, the agency determined that Bruce had no aptitude for math and that he would not receive any funding. Bruce, however, was not discouraged. He told his friend Laura, who just graduated from law school, that he would simply appeal the decision to federal court, have the judge do a fresh review, and provide additional information to the judge regarding his math aptitude that the agency did not have. He feels certain that he will win at the federal court level. Assuming the decision by the administrative agency was a factual finding, what should Laura tell Bruce regarding the standard of review the administrative agency will likely apply?That the agency will likely apply a de novo, or new, review.That the agency will likely apply an arbitrary and capricious standard in any review.That the agency will likely apply a substantial evidence…
A consumer group is investigating a producer of diet meals to examine if its prepackaged meals actually contain the advertised 6 ounces of protein in each package. Based on the following data, is there any evidence that the meals do not contain the advertised amount of protein? Run the appropriate test at a 5% level of
In the nation of Gondor, the EPA requires that half the new cars sold will meet a certain particulate emission standard a year later. A sample of 64 one-year-old cars revealed that only 20 met the particulate emission standard. What is the test statistic to see whether the proportion is below the requirement?
Globally, 35% of all ridged brittleshell tortoises have spots on their shells. A herpetologist in Citition collects a sample of 38 ridged brittlesell tortoises and finds that 16 of them have spots on their shells. The herpetologist would like to test the claim that the proportion of ridged brittleshell tortoises in Cititon with spots on their shells is greater than 35%. The herpetologist ends up rejecting the null hypothesis. If the actual proportion of ridged brittleshell tortoises in Cititon with spots on their shells is 41%, then what type of error, if any, has occurred? In the problem above, what is the test statistic?
There is some evidence that, in the years 1981— 85, a simple name change resulted in a short-term increase in the price of certain business firms' stocks (relative to the prices of similar stocks). (See D. Horsky and P. Swyngedouw, "Does it pay to change your company's name? A stock market perspective," Marketing Science v.6 pp. 320— 35, 1987.) Suppose that, to test the profitability of name changes in the more recent market (the past five years), we analyze the stock prices of a large sample of corporations shortly after they changed names, and we find that the mean relative increase in stock price was about 0.76%, with a standard deviation of 0.12%. Suppose that this mean and standard deviation apply to the population of all companies that changed names during the past five years. Complete the following statements about the distribution of relative increases in stock price for all companies that changed names during the past five years. (a)According to Chebyshev's theorem,…