Researchers studied a population of 61 carrier pigeons for one year to measurethe effects of air pollution, from a newly constructed factory, on populationgrowth. In the first three months 130 eggs were laid. Thinner shells are suspectedto have been a result of exposures to toxins in the air, and 50 eggs broke. Of theremaining eggs 58 hatched successfully and lived. However, 28 baby pigeonsdied from severe birth defects. During the next 7 months, 17 birds died as adirect exposure to the polluted air and 20 emigrated to a neighbouring rural area.In the remaining months of the year, 10 migrated into the area. Select the mostaccurate conclusion from this information: *The percentage of population growth was +5% , and this is an example of an openpopulation.The percentage of population growth was -5% , and this is an example of a closedpopulation.The percentage of population growth was -5% , and this is an example of an openpopulation.The percentage of population growth was +5% , and this is an example of a closedpopulation. Some scientists are trying to estimate the population of yellow birch trees in amunicipal park. Setting up a 100m^2 quadrat. Within this quadrat, the scientistscount 5 trees. Given that the area of the park is 1.32km^2 they estimate the totalpopulation of yellow birch trees to be: (Round your answer to the nearest tree). *400 trees39600 trees396 trees24 800 trees

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Answered: Researchers studied a population of 61…

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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An experiment to test the effectiveness of regular treatments with fluoride varnish to reduce tooth decay involved 36 volunteers who had half of their teeth (the right side or left side, determined by a coin flip) painted with a fluoride varnish every six month for 5 years. At the end of the treatments, the number of new cavities during the treatment period was compared on treatment (fluoride varnish) side versus the control (no fluoride varnish) side. The appropriate statistical test for analyzing the results of this experiment is O Paired t test for a mean difference O One sample z test for a population mean O Two sample t test for a difference in means O One sample z test for a population proportion O Two sample z test for a difference in proportions
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Researchers suspect that drinking tea might enhance the production of interferon gamma, a molecule that helps the immune system fight bacteria, viruses, and tumors. A recent study involved 20 healthy people who did not normally drink tea or coffee. Ten of the participants were randomly assigned to drink five cups of tea a day, while 10 were asked to drink the same amount of coffee. After two weeks, blood samples were exposed to an antigen and production of interferon gamma were measured. The results are shown in the following table: Теа: 55 17 54 49 10 46 21 14 53 Coffee: 16 12 20 52 37 15 22 30 3 Let X ~ N(ux,o3) be the interferon gamma production for participants who drink tea and observations for the ten participants who drink tea are a random sample from X. Let Y ~ N(uy,o) be the interferon gamma production for participants who drink coffee and observations for the ten participants who drink coffee are a random sample from Y. Some R output that may help. > p1 qnorm(p1) [1] -2.326…
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