1. The Human Toxome Project (HTP) is working to understand the scope of industrialpollution in the human body. Industrial chemicals may enter the body through pollution oras ingredients in consumer products. In October 2008, the scientists at HTP tested cordblood samples for 20 newborn infants in the United States. The cord blood of the "Inutero/newborn" group was tested for 430 industrial compounds, pollutants, and otherchemicals, including chemicals linked to brain and nervous system toxicity, immunesystem toxicity, reproductive toxicity, and fertility problems. There are health concernsabout the effects of some chemicals on the brain and nervous system. The table belowshows how many of the targeted chemicals were found in each infant's cord blood.79145147160116100159151156126137831569412114412311413999Use this sample data to construct the 90% confidence interval estimate for the meannumber of targeted industrial chemicals to be found in an infant's blood.

Answered: 1. The Human Toxome Project (HTP) is…

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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Kentville, a community of 10,000 people, resides next to a krypton mine, and there is a concern that the emission from the krypton smelter have resulted in adverse effects. Specifically, Kryptonosis seems to have killed 12 of Kentville’s inhabitants last year. A neighboring community, Lanesburg, has 25,000 inhabitants and is far enough from the smelter to not be affected by the emission. In Lanesburg, only three people last year died of Kryptonosis. Given that the number of deaths in Kentville and their causes last year were: Heart attack=7 Accidents=4 Kryptonosis=12 Other=6 What is the risk of dying of Kryptonosis in Kentville relative to non-contaminated locality?What is the risk of dying of Kryptonosis in Kentville relative to deaths due to other causes? How many times the chance of dying of Kryptonosis compared to dying of accidents ? How many times the chance of dying of Kryptonosis compared to Other causes?
6.6 The Department of Natural Resources (DNR) received a complaint from recreational fish- ermen that a community was releasing sewage into the river where they fished. These types of releases lower the level of dissolved oxygen in the river and hence cause damage to the fish resid- ing in the river. An inspector from the DNR designs a study to investigate the fishermen’s claim. Fifteen water samples are selected at locations on the river upstream from the community and fifteen samples are selected downstream from the community. The dissolved oxygen readings in parts per million (ppm) are given in the following table. Upstream 5.2 4.8 5.1 5.0 4.9 4.8 5.0 4.7 4.7 5.0 4.6 5.2 5.0 4.9 4.7 Downstream 3.2 3.4 3.7 3.9 3.6 3.8 3.9 3.6 4.1 3.3 4.5 3.7 3.9 3.8 3.7 a. In order for the discharge to have an impact on fish health, there needs to be at least an .5 ppm reduction in the dissolved oxygen. Do the data provide sufficient evidence that there is a large enough reduction in the mean…
4. The number of passengers (in thousands) for the leading U.S. passenger airlines in 2004 is indicated below. 91,570 86,755 81,066 70,786 55,373 42,400 40,551 21,119 16,280 14,869 13,659 13,417 13,170 12,632 11,731 10,420 10,024 9,122 7,041 6,954 6,406 6,362 5,930 5,585 5,427• Use the data to construct a grouped frequency distribution and a cumulative frequency distribution with a reasonable number of classes and comment on the shape of the distribution using graph.
Of the 30 newly accepted juveniles into juvenile hall, half were placed in the regular program and half were placed in the vitamin and supplements program. After 12 months researchers documented the number of infractions that occurred for each of the 30 students and wanted to assess if the program worked. Group 1 (average infractions per month)• 3.2 1 0 4.7 5.3 2 1.6 4 2.8 7 4 3.1 5.7 0 1.8 Group 2 -Vitamins (average infractions per month) 0 5.2 1.2 2.1 3 1.7 0 2.9 .7 4.3 3.1 1.4 2 .9 2.6 Construct an independent samples t-test either by hand or using spss. (Be sure to interpret)
Of the 30 newly accepted juveniles into juvenile hall, half were placed in the regular program and half were placed in the vitamin and supplements program. After 12 months researchers documented the number of infractions that occurred for each of the 30 students and wanted to assess if the program worked. Group 1 (average infractions per month)• 3.2 1 0 4.7 5.3 2 1.6 4 2.8 7 4 3.1 5.7 0 1.8 Group 2 -Vitamins (average infractions per month) 0 5.2 1.2 2.1 3 1.7 0 2.9 .7 4.3 3.1 1.4 2 .9 2.6 Construct an independent samples t-test by hand. (Be sure to interpret)
#10 review ch7
At Conner Company, a custom manufacturer of printed circuit boards, the finished boards are subjected to a final inspection prior to shipment to its customers. As Conner’s quality assurance manager, you are responsible for making a representation to management on quality problems at the beginning of each month. Your assistant has analyzed the reject memos for all the circuit boards that were rejected during the past month. He has given you a summary statement listing the reference number of the circuit board and the reason for rejection from one of the following categories: A = Poor electrolyte coverage; B = Improper lamination; C = Low copper plating; D = Plating separation ; E = Improper etching For 50 circuit boards that had been rejected last month, the summary statement showed the following: C B C C D E C C B A D A C C C B C A C D C A C C B A C A C B C C A C A A C C D A C C C E C C A B A C Develop a Pareto chart to identify the more significant types of rejection, what would you…
At Conner Company, a custom manufacturer of printed circuit boards, the finished boards are subjected to a final inspection prior to shipment to its customers. As Conner’s quality assurance manager, you are responsible for making a representation to management on quality problems at the beginning of each month. Your assistant has analyzed the reject memos for all the circuit boards that were rejected during the past month. He has given you a summary statement listing the reference number of the circuit board and the reason for rejection from one of the following categories: A = Poor electrolyte coverage; B = Improper lamination; C = Low copper plating; D = Plating separation ; E = Improper etching For 50 circuit boards that had been rejected last month, the summary statement showed the following: C B C C D E C C B A D A C C C B C A C D C A C C B A C A C B C C A C A A C C D A C C C E C C A B A C Rearrange the different reasons for rejection according to the step in the Pareto Analysis.…
2. The U.S. Department of Energy provides fuel economy information for a variety of motor vehicles. A sample of 10 automobiles is shown in Table 1.6 (Fuel Economy website, Feb- ruary 22, 2008). Data show the size of the automobile (compact, midsize, or large), the number of cylinders in the engine, the city driving miles per gallon, the highway driving miles per gallon, and the recommended fuel (diesel, premium, or regular). a. How many elements are in this data set? b. How many variables are in this data set? c. Which variables are categorical and which variables are quantitative? d. What type of measurement scale is used for each of the variables?
According to CDC estimates, more than 2.8 million people in the United States are sickened each year with antibiotic‑resistant infections, with at least 35,000 dying as a result. Antibiotic resistance occurs when disease‑causing microbes become resistant to antibiotic drug therapy. Because this resistance is typically genetic and transferred to the next generations of microbes, it is a very serious public health problem. Of the infections considered most serious by the CDC, gonorrhea has an estimated 1.14 million new cases occurring annually, and approximately 50% of those cases are resistant to any antibiotic. Assume a health clinic in California sees 11 patients with gonorrhea in a given week. Information obtained from the Centers for Disease Control and Prevention website, at www.cdc.gov. (b) What is the mean of ?? Give your answer to one decimal place. mean of ?: What is the standard deviation of ?? Give your answer to three decimal places.…
According to the American Management Association, most U.S. companies now test at least some employees and job applicants for drug use. The U.S. National Institute on Drug Abuse claims that about 15% of people in the 18-25 age bracket use illegal drugs. Allyn Clark, a 21 year-old college graduate, applied for a job at the Acton Paper Company, took a drug test, and was not offered a job. He suspected that he might have failed the drug test, even though he does not use drugs. In checking with the company's personnel department, he found that the drug test has 99% sensitivity, which means that only 1% of drug users incorrectly test negative. Also, the test has 98% specificity, meaning that only 2% of nonusers are incorrectly identified as drug users. Allyn felt relieved by these figures because he believed that they reflected a very reliable test that usually provides good results. But is this really true? The accompanying table shows data for Allyn and 1,499 other job applicants. Based…
2) . In February 2021, the Chicago Tribune reported:“The overdose epidemic that has ravaged Chicago has not spared the nearby suburbs, some of which have death rates comparable to anything seen in the city, according to a report released this week by the Cook County Department of Public Health. ZIP codes in the towns of Worth, Broadview, Maywood, and Forest Park, areas that “have substantially lower median household incomes and higher poverty rates,” have been especially hard-hit, the report said.”In the article, they claimed that lower incomes were associated with higher overdose death rates and that overdose death rates are increasing over time. The data you have been analyzing wasn’t focused on Chicago, obviously. But do your results support the general gist of the statistical argument being made in this Tribune excerpt? Please address:• Do overdose death rates appear to be associated with per capita income (use scatterplot)?• Do overdose death rates appear to be increasing over…

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