A farmer wants to compare the tastiness and juiciness of tomatoes grown with three amounts of a new fertilizer: none, half the recommended amount, and the fullrecommended amount. The farmer allocates 6 tomato plants to receive each amount of fertilizer, assigning them at random. If the tomato taster does not know howthe tomatoes have been treated, is the experiment single or double-blind? How might the blinding be improved further?If the tomato taster does not know how the tomatoes have been treated, is the experiment single or double-blind?The experiment isHow might the blinO A. The amoundouble-blind,ermined for each tomato plant before the farmer purchases them.O B. The farmerach day which level of fertilizer to apply to each tomato plant.O C. The farmersingle-blind.proportions pre-mixed and then apply them without knowing the amount of fertilizer being applied to each tomato.O D. The experiment is already double-blind. The blinding cannot be irhproved further.

Answered: A farmer wants to compare the tastiness…

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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Athletes performing in bright sunlight often smear black eye grease under their eyes to reduce glare. Does eye grease work? In one study, 16 student subjects took a test of visual sensitivity to light‑and‑dark contrast after three hours facing into bright sun, both with and without eye grease. This is a matched pairs design. If eye grease is effective, subjects will be more sensitive to contrast when they use eye grease. The differences in sensitivity, with eye grease minus without eye grease, are provided in the table. Differences in Sensitivity 0.070.07 0.640.64 −0.12−0.12 −0.05−0.05 −0.18−0.18 0.140.14 −0.16−0.16 0.030.03 0.050.05 0.020.02 0.430.43 0.240.24 −0.11−0.11 0.280.28 0.050.05 0.290.29 STATE: We want to know whether eye grease increases sensitivity on the average. Suppose that the subjects are an SRS of all young people with normal vision, that contrast differences follow a Normal distribution in this population, and that the standard deviation of…
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Most people love chocolate for its great taste. But does it also make you smarter? A scatterplot like this one recently appeared in the New England Journal of Medicine. The explanatory variable is the chocolate consumption per person for a sample of countries. The response variable is the number of Nobel Prizes per 10 million residents of that country. 35- r = 0.791 • Switzerland 30- Denmark 25- Austria: • Norway 20- • United Kingdom 15- The Netherlands, United States • Ireland • Germany 10- . France • Finland Belgium. Canada. • Australia Portugal Japan Greese • Spain Poland Italy 0- China Brazil 10 15 Chocolate consumption (kg/yr per person) Interpret the correlation of r = 0.791. Nobel laureates (per 10 million people)
Many states mandate tests that have to be passed in order for the students to graduate with a high school diploma. A local school superintendent believes that after-school tutoring will improve the scores of students in his district on the state's graduation test. As a trial run, a tutor agrees to work with 15 students for a month. The superintendent ask the school board to implement this after-school tutoring program if there is evidence that student scores would increase by an average of more than 20 points. Create a 95% confident level to estimate the true score increase. 25.4 23.3 17.8 21.3 14.8 28.8 22.5 23.6 32.3 15.4 23.4 27.5 18.8 19.1 20.4 a. Confidence Interval b. Conclusion
Camille for her part wants to assess the impact of an awareness campaign aimed at reducing the amount of household food waste. The campaign is taking place in a subset of neighborhoods of Ville de Montréal. Camille’s objective is to compare the average amount of food waste produced in those neighborhoods, with that in neighborhoods not targeted by the campaign. Therefore, she randomly chooses five neighborhoods targeted by the campaign and five neighborhoods where the campaign does not take place. In each of the 10 neighborhoods, she monitors the weekly amount of food waste (kg) for each of a number of households, and calculates amounts on a per household basis; see below. Is the amount of food waste per household in the neighborhoods targeted by the campaign lower, on average, than in those not targeted by the campaign? Use α= 0.05.
Athletes performing in bright sunlight often smear black eye grease under their eyes to reduce glare. Does eye grease work? In one study, 16 student subjects took a test of sensitivity to contrast after three hours facing into bright sun, both with and without eye grease. Greater sensitivity to contrast improves vision and glare reduces sensitivity to contrast. This is a matched pairs design. The differences in sensitivity, with eye grease minus without eye grease is given. Differences in sensitivity, with eye grease minus without eye grease 0.07 0.64 -0.12 -0.05 -0.18 0.14 -0.16 0.03 0.05 0.02 0.43 0.24 -0.11 0.28 0.05 0.29 To access the complete data set, click the link for your preferred software format: Excel Minitab14-18 Minitab18+ JMP SPSS TI R Mac-TXT PC-TXT CSV CrunchIt! How much more sensitive to contrast are athletes with eye grease than without eye grease? Give a 99% confidence interval to answer this question. (Enter your answers rounded to four decimal places.) Lower bound…
An aerosolized vaccine for measles was developed in Mexico and has been used on 44 million children since 1980. Aerosolized vaccines have the advantages of being able to be administered by people without clinical training and do not cause injection‐associated infections. The percentage of children developing an immune response to measles after receiving the subcutaneous injection of the vaccine is 95%,95%, and for those receiving the aerosolized vaccine, it is 85%85% . There are 2020 children to be vaccinated for measles using the aerosolized vaccine in a small rural village in India. We are going to count the number who developed an immune response to measles after the vaccination. (b) What is the probability that at least one child does not develop an immune response to measles after receiving the aerosolized vaccine? (Enter your answer as a proportion rounded to four decimal places.)
Peter is conducting an experiment to determine whether a new medication is effective in reducing swelling. He gets 1,500 volunteers with swelling and divides them into two groups. The control group does not receive any medication; the treatment group receives the medicationThe patients in the treatment group show reduced signs of swelling. What can Peter conclude from this experiment?
On the Great Stark island, the likelihood of a residential fire is evenly distributed at 12 per month. Residents are evenly distributed along the 64-mile perimeter of the island. The government is providing fire protection, and a fire department's fixed cost is $60,000 per month. If the travel cost to fight a fire is $2,500 per mile, what is the optimal number of fire departments?

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