On September 10, 2020 a survey of 24,000 residents in nursing homes between 75 and 90 years old in a western state revealed that there were 145 cases of Covid-19. The total population of the western state is 125,000. What is the prevalence of Covid-19 in nursing homes per 1,000 residents?

On September 10, 2020 a survey of 24,000 residents in nursing homes between 75 and 90 years old in a western state revealed that there were 145 cases of Covid-19. The total population of the western state is 125,000. What is the prevalence of Covid-19 in nursing homes per 1,000 residents?

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

In a recent survey, 32% of employed U.S. adults reported that basic mathematical skills were critical or very important to their job. The supervisor of the job placement office at a 4 year college thinks this percentage has increased due to increased use of technology in the workplace. She takes a random sample of 250 employed adults and finds that 95 of them feel that basic mathematical skills are critical or very important to their job. Is there sufficient evidence to conclude that the percentage of employed adults who feel basic mathematical skills are critical or very important to their job has increased at the a=.1 level of significance? what are the null and alternative hypotheses? determine the test statistic. Z0= ? please show work and explain how to use ti 83 calc to solve
The article “State and Federal Data on COVID-19 Testing Don’t Match Up” by Meyer and Madrigal in May 2020 stated that Florida had reported conducting 700,000 coronavirus tests, yet the Centers for Disease Control and Prevention reported Florida had conducted 919,000. The difference between these reports is 219,000 tests. What is the difference between the number of tests Florida reported administering and the number the CDC reported the state-administered as a percent of the number of tests reported by Florida? Round your answer to the nearest hundredth of a percent.
Two different blood pressure medicines are being compared to determine if the average reduction in blood pressure is the same for each medication. The goal of the study is to determine if the medications differ. Twenty men age 50-60 years old are selected for the study. Ten men are chosen at random to receive the first medication and the other 10 men receive the second medication. Each of the 20 men is monitored for one month to determine the change in blood pressure over that time. Minitab provides the 95% confidence interval for (mu1 - mu2) (2.63, 14.18) a. Interpret this 95% CI. b. What assumptions (be specific) are necessary to construct this CI?
Researchers wanted to determine if having a computercomputer in the bedroom is associated with obesity. The researchers administered a questionnaire to 394394 twelve-year-old adolescents. After analyzing the results, the researchers determined that the body mass index of the adolescents who had a computercomputer in their bedroom was significantly higher than that of the adolescents who did not have a computercomputer in their bedroom. Complete parts (a) through (e) below.(a) Why is this an observational study? What type of observational study is this? Why is this an observational study? A.The researchers administered a questionnaire to obtain their data without trying to influence an explanatory variable of the study. B.The researchers observed the behavior of the individuals in the study without trying to influence an explanatory variable of the study. C.The researchers tried to influence the outcome of the study. D.The researchers intentionally changed an explanatory…
Suppose a researcher conducted a study examining the effectiveness of font type (OpenDyslexic vs. Times New Roman) on reading comprehension for 20 students with dyslexia. After reading a passage in one of the two fonts, 10 students in each of the two font conditions completed a brief reading comprehension test of 15 questions. The number of correctly answered questions for each student is given in the table below: Complete the following in the context of conducting data analysis/ a. Calculate the average number of correct test questions for each group b. Calculate the standard deviation for each group c. Calculate the median and mode for both groups d. Calculate the interquartile range for each group OpenDyslexic 10 9 11 8 24867 12 14 Times New Roman 6675 & Na 43 4 2 8 9
Due to the alarming cases of Covid-19, a researcher wanted to study the characteristics of the patients in NCR infected by the virus. Lilliefors, a researcher, considered the following variables: M: age bracket (0-19, 20-39, 40-59, 60 and above) N: last country visited in the past 3 months O: number of days quarantined after manifestation of symptoms P: current status of the patient (mild, moderate, severe) 6. To answer the objective of the study, Lilliefors used different data collection methods. First, she gathered information about the variables of interest by letting the patients answer a self-administered questionnaire. Second, to supplement the data she gathered, she collected the sociodemographic profile of the patients using the data from the Department of Health. The methods of data collection used by Lilliefors are ________. A. objective and subjective, respectively B. subjective and objective, respectively C. objective and use of existing records, respectively…
A paper describes a study of the use of MRI (Magnetic Resonance Imaging) exams in the diagnosis of breast cancer. The purpose of the study was to determine if MRI exams do a better job than mammograms of determining if women who have recently been diagnosed with cancer in one breast have cancer in the other breast. The study participants were 950 women who had been diagnosed with cancer in one breast and for whom a mammogram did not detect cancer in the other breast. These women had an MRI exam of the other breast, and 101 of those exams indicated possible cancer. After undergoing biopsies, it was determined that 30 of the 101 did in fact have cancer in the other breast, whereas 71 did not. The women were all followed for one year, and four of the women for whom the MRI exam did not indicate cancer in the other breast were subsequently diagnosed with cancer that the MRI did not detect. The accompanying table summarizes this information. Cancer Cancer Not Present Present Total MRI…
Each year, more than 2 million people in the United States become infected with bacteria that are resistant to antibiotics. In particular, the Centers of Disease Control and Prevention have launched studies of drug-resistant gonorrhea.† Suppose that, of 189 cases tested in a certain state, 12 were found to be drug-resistant. Suppose also that, of 429 cases tested in another state, 8 were found to be drug-resistant. Do these data suggest a statistically significant difference between the proportions of drug-resistant cases in the two states? Use a 0.02 level of significance. (Let p1 = the population proportion of drug-resistant cases in the first state, and let p2 = the population proportion of drug resistant cases in the second state.) State the null and alternative hypotheses. (Enter != for ≠ as needed.) H0: ______ Ha: ______ Find the value of the test statistic. (Round your answer to two decimal places.) = What is the p-value? (Round your answer to four decimal places.) p-value =…
A Journal published longitudinal study of hearing impairment in a group of elderly patients with intellectual disabilities. The hearing function of each patient was screened each year over a 10 - year period. At the study's conclusion, the hearing loss of each patient was categorized as severe, moderate, mild, or none. The classification of the 28 surviving patients are summarized in the following table. Hearing loss Number of Patients None 7 Mild 7 Moderate 9 Severe 5 Total 28 Conduct a test to determine whether the trueproportions of intellectually disabled elderly patients in each ofthe hearing-loss categories differ. Use a 5% significance level. We are doing this on a Ti84 plus Calculator.
Is There a Genetic Marker for Dyslexia? A disruption of a gene called DYXC1 on chromosome 15 for humans may be related to an increased risk of developing dyslexia. Researchers1 studied the gene in 109 people diagnosed with dyslexia and in a control group of 195 others who had no learning disorder. The DYXC1 break occurred in 10 of those with dyslexia and in 5 of those in the control group.1Science News, August 30, 2003, p 131. (a) Is this an experiment or an observational study? Experiment Observational study (b) How many rows and how many columns will the data table have? Assume rows are the cases and columns are the variables. (There might be an extra column for identification purposes; do not count this column in your total.) Number of rows: Enter your answer in accordance to item (b) of the question statement Number of columns: Enter your answer in accordance to item (b) of the question statement (c) Display the results of the study in a…