16. Calcium is an essential nutrient for strong bones and for controlling blood pressure and heartbeat. Because most of the body's calcium is stored in bones and teeth, the body withdrawsthe calcium it needs from the bones. Over time, if more calcium is taken out of the bones thanis put in, the result may be thin, weak bones. This is especially important for women who areoften recommended a calcium supplement. A consumer group activist assumes that calciumcontent in two popular supplements are normally distributed with the same (assumed equal)unknown population variance, and uses the following information obtained under independentsampling:Supplement 1Supplement 21.000 mg1.016mgI=s= 23 mgI2Sy = 24 mg-122-15Let A and denote the corresponding population means, Construct a 95% confidenceinterval for the difference ph - .A. [-30.9386, 1.0614]B. [-31.5886,-0.4114]C. [-33.8007, 1.8007]D. [-34.8012, 2.8012] 17. In August 2010, Massachusetts enacted a 150-day right-to-cure period that mandates thatlenders give homeowners who fall behind on their mortgage an extra five months to becomecurrent before beginning foredosure proceedings. Policymakers daimed that the policy wouldresult in a higher proportion of delinquent borrowers becoming current on their mortgages.To test this claim, researchers took a sample of 244 homeowners in danger of foreclosure inthe time period surrounding the enactment of this law. Of the 100 who fell behind just beforethe law was enacted, 30 were able to avoid foreclosure, and of 144 who fell behind just afterthe law was enacted, 48 were able to avoid foredosure, Let p, and pz represent the proportionof delinquent borrowers who avoid foredosure just before and just after the right-to-cure lawis enacted, respectively, Which of the following is the correct competing hypotheses that willtest the policymakers' claim?A. Ho: p.-P2 50, HA: p. -P2 > 0B. Ho: p,- p, 2 0, HA: P1 -P2 < 0C. H: p.- p, = 0, HA: P,- P2 0D. Ho: p, - p2 > 0, HA: P1 - P2 500, HA: p1 - pz #0%3D

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16. Calcium is an essential nutrient for strong bones and for controlling blood pressure and hear beat. Because most of the body's calcium is stored in bones and teeth, the body withdraw= the calcium it needs from the bones. Over time, if more calcium is taken out of the bones thar is put in, the result may be thin, weak bones. This is especially important for women who are often recommended a calcium supplement. A consumer group activist assumes that calcium content in two popular supplements are normally distributed with the same (assumed equal) unknown population variance, and uses the following information obtained under independent sampling: Supplement 1 Supplement 2 1,000 mg 22 = 1,016 mg S2 = 24 mg S= 23 mg -12 72-15 Let u and ph denote the corresponding population means, Construct a 95% confidence interval for the difference A-.

16. Calcium is an essential nutrient for strong bones and for controlling blood pressure and hear beat. Because most of the body's calcium is stored in bones and teeth, the body withdraw= the calcium it needs from the bones. Over time, if more calcium is taken out of the bones thar is put in, the result may be thin, weak bones. This is especially important for women who are often recommended a calcium supplement. A consumer group activist assumes that calcium content in two popular supplements are normally distributed with the same (assumed equal) unknown population variance, and uses the following information obtained under independent sampling: Supplement 1 Supplement 2 1,000 mg 22 = 1,016 mg S2 = 24 mg S= 23 mg -12 72-15 Let u and ph denote the corresponding population means, Construct a 95% confidence interval for the difference A-.

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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excerpt from “Shoes: Feet First!”from A History of Travel in 50 Vehiclesby Paula Grey & Phillip Hoose Despite the relatively recent age of the early shoes found to date, scientists believe that humans were wearing shoes as much as 40,000 years ago. Shoes made of reeds, papyrus, or even leather decompose easily, leaving few or no traces. But people who don’t wear shoes have wider feet and bigger gaps between their big toe and the other four. In studying bones of the smaller toes of fossilized skeletons, scientists observed that the thickness of these bones decreased somewhere between 40,000 and 26,000 years ago. They believe the change was the result of wearing shoes. 1 Select the correct answer. Read this sentence again. In studying bones of the smaller toes of fossilized skeletons, scientists observed that the thickness of these bones decreased somewhere between 40,000 and 26,000 years ago. How does the sentence develop the author’s claim in the passage?…
A special education teacher did research on whether or not there is a relationship between the number of students in his class and the number incidents of “acting out” behaviors exhibited by the autistic students in the classroom. He collects data for a year and aggregates them by month. He obtained the statistics below, r= -.863 R2=.74 b= -1.212294 a= 131.176598 10.) How does the presence of more students affect the incidents in the class? a) as students are added the incidences increase b) as students are added the incidences decrease c) the number of students does not affect acting out d) the number of students caused more incidents How much of the variability of acting out is explained by the number of students in the class?___________
Multiple myeloma, or blood plasma cancer is characterized by increased blood vessel formulation (angiogenesis) in the bone marrow that is a predictive factor in survival. One treatment approach used for multiple myeloma is stem cell transplantation with the patient’s own stem cells. The data in the table below represent the bone marrow micro-vessel density for patients who had a complete response to the stem cell transplant and at the time the complete response was determined. Patient Before After 1 158 284 2 189 214 3 202 101 4 353 227 5 416 290 6 426 176 7 441 290 Please show work done by hand and/or using Excel formulas, graphing calculator unavailable. At the 0.05 level of significance, is there evidence that the mean bone marrow micro-vessel density is higher before the stem cell transplant than after the stem cell transplant?
People gain weight when they take in more energy from food than they expend. Researchers wanted to investigate the link between obesity and energy spent on daily activity. Choose 20 healthy volunteers who don't exercise. Deliberately choose 10 who are lean and 10 who are mildly obese but still healthy. Attach sensors that monitor the subjects' every move for 10 days. The table below presents data on the time (in minutes per day) that the subjects spent standing or walking, sitting, and lying down. Is there a significant difference between the mean times the two groups spend lying down? Let ?1 be the mean time spent lying down by the lean group, and ?2 be the mean time for the obese group. Time (minutes per day) spent in three different postures by leanand obese subjects Group Subject Stand/Walk Sit Lie Lean 1 509.100 366.300 554.500 Lean 2 603.925 374.512 452.650 Lean 3 322.212 580.138 533.362 Lean 4 581.644 362.144 489.269 Lean 5…
Paul is conducting an experiment to relate fuel economy (MPG) with the amount of CO2 (grams/mile). Paul conducted an experiment on 12 different vehicle owners. Table below presents the fuel economy and CO2 emitted. Fuel economy Vs. CO2 emissions. Fuel Economy CO, emissions(g/mi) 314 (MPG) 29.2 26.5 324 28.5 312 28.1 317 28 316 24.1 344 26.1 352 25 356 23.4 381 22.8 389 22.2 399 1) Obtain a linear regression equation line for the data 2) Predict the CO emissions when the fuel economy is 24 MPG
.A new, miracle diabetes drug that diminishes major symptoms of diabetes has been approved by the FDA. Health care professionals and researchers believe that the new drug will prolong lifespan of diabetes patients. If the population is in steady state and the incidence is constant, what will the effect of this new drug be on the prevalence of diabetes in the population? Explain.
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The bacterium Staphylococcus aureus is commonly found on the skin and rarely causes major problems. If it gets under the skin or into the lungs it can cause boils or pneumonia. If the strain of bacterium causing these problems is resistant to methicillin, the infections can be life threatening. Methicillin resistant Staphy- lococcus aureus or MRSA is, therefore, a major concern in hospitals and clinics. Given the death rate from MRSA lung infections is 20%, if 20 patients are admitted in the hospital find the following probabilities: (a) Less than 3 die (b) At least 3 die. (c) Between 6 and 3 die.
Early life corresponds to the first bacterial colonization of the digestive tract, creating a microbiome thought to play an important role in human development. What might be the effect of early exposure to antibiotics on children's development? One study followed 11,532 full-term babies all born in the county of Avon, United Kingdom, during 1991 and 1992. Exposures to antibiotics during infancy were recorded, along with measures of body mass at regular intervals over several years. The researchers found that antibiotic exposure during the first six months of life was associated with increased body mass later in childhood.
We have data on the lean body mass and resting metabolic rate for 12 women who are subjects in a study of dieting. Lean body mass, given in kilograms, is a person's weight leaving out all fat. Metabolic rate, in calories burned per 24 hours, is the rate at which the body consumes energy. Mass 54.9 43.9 39.4 43.5 36.6 44.5 47.9 46.4 53.8 54.3 43.9 51.5 Rate 990 1030 1220 1300 1460 1600 1450 1120 1280 1070 1070 1190 Find the least-squares regression line for predicting metabolic rate from body mass. ANSWER:
Ankylosing spondylitis is an inflammatory disease which affects the spine and sacroiliac joint and can lead to the fusing of vertebrae in the spine. Exercise is important in helping manage pain, therefore a pharmaceutical company wanted to test if their new biologic would increase the time a patient could exercise before experiencing discomfort. The following table gives the time (in minutes) seven patients were able to exercise before reporting pain, both at baseline and then again after six months of taking the biologic.Exercise Time (in minutes)Subject 1 Baseline 30 Post-treatment 40Subject 245 40Subject 350 60Subject 435 37Subject 555 60Subject 620 25Subject 775 75Assume the population(s) of all exercise times is (are) normally distributed. Use JMP to test whether the evidence suggests that the time a person with ankylosing spondylitis can exercise before experiencing discomfort increases after taking this new biologic. Validate the test statistic from JMP by computing it manually.…
We have data on the lean body mass and resting metabolic rate for 12 women who are subjects in a study of dieting. Lean body mass, given in kilograms, is a person's weight leaving out all fat. Metabolic rate, in calories burned per 24 hours, is the rate at which the body consumes energy. Mass 46 47.7 47.7 38.8 52.1 48.8 48.5 36.8 42 51 43.9 46.7 Rate 1240 1320 1220 1280 1430 1090 1590 990 1090 960 1520 1390| Find the least-squares regression line for predicting metabolic rate from body mass. ANSWER: ŷ