The article "Nutrient Deprivation Improves Field Performance of Woody Seedlings in aDegraded Semi-arid Shrubland" (R. Trubata, J. Cortina, and A. Vilagrosaa, EcologicalEngineering, 2011:1164–1173) presents a study that investigated the effect of varying thetype of fertilizer on the height of certain Mediterranean woody tree species. In oneexperiment, three samples, each consisting of ten trees, were grown with three differentfertilizers. One, the control group, was grown with a standard fertilizer. Another was grownwith a fertilizer containing only half the nutrients of the standard fertilizer. Thethird was grown with the standard fertilizer to which a commercial slow-releasefertilizer had been added. Following are the heights of the trees after one year. These dataare consistent with the means and standard deviations reported in the article.FertilizerControlHeight17.9 12.2 14.9 13.8 26.1 15.4 20.3 16.9 20.8 14.8Deficient7.0 6.9 13.3 11.1 11.0 16.5 12.7 12.4 17.1 9.0Slow-19.8 20.3 16.1 17.9 12.4 12.5 17.4 19.9 27.3 14.4releaseConstruct an ANOVA table. You may give a range for the P-value.Can you conclude that the heights differ among the types of fertilizer?a.b.

a. The null hypothesis assumes that the mean heights of trees after one year, for the three…

Answered: The article "Nutrient Deprivation…

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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To investigate the effect of price on toaster sales, a chain of department stores decided to raise the price of a certain brand of toaster in 20 randomly selected stores (Sample A) and to lower the price in 10 randomly selected stores (Sample B). Monthly revenue (number sales x sales price) from these toasters was recorded for each of the 30 stores. Results from the two samples are as follows: No. of stores Мean Std. Dev. Sample A Sample B $842 $817 $217 $202 20 10 If you considered these to be independent samples, what would be the pooled estimate of the standard deviation for revenue? Calculate a 95% confidence interval for the difference between (а) (b) the two means.
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23.2 Aerosolized Vaccine for Measles. An aerosolized vaccine for measles wwas (pages 530 and 532). process developed in Mexico and has been used on more than 4 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 infec tions. Despite these advantages, data about efficacy of the aerosolized vaccines against measles compared to subcutaneously injection of the vaccine have been inconsistent. Because of this, a large randomized controlled study was conducted using children in India. The primary outcome was an immune response to measles measured 91 days after the treatments. Among the 785 children receiving the sub- cutaneous injection, 743 developed an immune response, while among the 775 children receiving the aerosolized vaccine, 662 developed an immune response. (a) Compute the proportion of subjects experiencing the primary outcome for both the aerosol and…
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Better Traffic Flow Exercise 2.155 introduces the dataset TrafficFlow, which gives delay time in seconds for 24 simulation runs in Dresden, Germany, comparing the current timed traffic light system on each run to a proposed flexible traffic light system in which lights communicate traffic flow information to neighboring lights. On average, public transportation was delayed 105 seconds under the timed system and 44 seconds under the flexible system. Since this is a matched pairs experiment, we are interested in the difference in times between the two methods for each of the 24 simulations. For the n = 24 differences D, we saw in Exercise 2.155 that x‾D=61 seconds with sD = 15.19 seconds. We wish to estimate the average time savings for public transportation on this stretch of road if the city of Dresden moves to the new system. (a) What parameter are we estimating? Give correct notation. (b) Suppose that we write the 24 differences on 24 slips of paper. Describe how to…
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