How contagious and dangerous is the Delta variant?Medical study reports that viral loads in Delta infections are 1000 times higher than those in infections caused by other variants. Data show that Delta variant affectsabout 62 out of 100 people. In response to this information, the World Health Organisation (WHO) regards Delta as"the fastest and fittest" variant so far. The main type of COVID-19 Delta variant test is nucleic acid detection test and the test is quite accurate. We know that theprobability that the test result is positive given that the person does not have Delta variant is only 1.5%, and the probability that the test result is negative given that theperson has Delta variant is only 0.5%. A random person in Perth gets tested for COVID-19 Delta variant and the result comes back positive. What is the probability thatthe person has Delta variant?O A. 0.9908O B. 0.9926O C. 0.9939O D. 0,9969

Answered: Image /qna-images/answer/327f37d3-96f9-4245-ab71-e172a9c9cfe3.jpg

Answered: How contagious and dangerous is the…

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

A study was conducted that investigated the gene ACTN3, which encodes a protein that functions in fast-twitch muscle fibres. People can be classified according to which genotype of this gene they have, RR, RX or XX. The study included a sample of elite sprinters and a sample of endurance athletes. The researchers are investigating whether there is an association between the genotype classification and the type of athlete (sprinters or endurance). What type of hypothesis test would be appropriate for this study? Explain your answer in one or two sentences.
While some western, traditional, or home remedies alleviate symptoms of mild COVID19, there are no vaccines that have been shown to prevent the disease. However, there are several ongoing clinical trials of these potential drugs. Four laboratories were being used to test the drugs that have proved effective in treating “corona patients” in four different countries namely United States of America, England, China, and Israel. As part of the study to determine whether or not they give on the average the same results. The results for the number of days taken by mild cases to recover were as follows: Laboratory A B C D 3 7 1 7 6 9 4 3 5 8 5 5 4 4 2 6 3 5 3 7 Perform the analysis of variance and give conclusions concerning the drugs at the 0.05 level of significance
Sickle-cell anemia is a hereditary chronic blood disease that is extremely severe when an individual carries two copies of the defective gene. It is particularly common in countries plagued by malaria, a parasiticinfection transmitted by mosquitoes. A study in Africa tested 543 children for the sickle-cell gene and also for malaria. In Group 1 which consisted of 136 children with the sickle-cell gene, 36 children had severe malariainfections. Group 2 consisted of 407 children without the sickle-cell gene, and 152 of them had severe malaria infections. Conduct a test to determine if the proportion of severe malaria infections among children withthe sickle-cell trait is different from that among children without. Test at 5% level of significance. Question: What is your p value and t statistic ?
A study published in JAMA in 2004 examined past results of other studies on bariatric surgery. Bariatric surgery is done to replace the size of the stomach in various ways. It is typically used on only obese patients, and one the traditional form of the surgery, gastric bypass has a 1% mortality (death) rate caused by surgery. However, in the studies reporting on the effects of the surgery on Type ll diabetes, 1417 of 1846 diabetic patients recovered completely from diabetes after surgery. These patients no longer need medication like insulin (which is injected into the skin) or pills to help manage blood sugar. In a study released a decade later, the percentage of patients who recover from diabetes has increased 80%. Using confidence intervals determine whether this is a significant change from the 2004 data. Use n=2000
IL-6 is a cytokine released as an immune response to infection. Elevated IL-6 is suggested to be predictive of severe illness with Covid-19. Suppose we wanted to conduct a study to see if this is true among patients with Covid-19 in Florida. Assuming from a previous studies in other areas of the US, the mean IL-6 id 8.87 pg/mL (s.d. = 6.09 pg/mL) among individuals with moderate disease and 7.66 pg/mL (s.d.= 4.97 pg/mL) among individuals that are asymptomatic or have mild illness, how many people in total, would need to enroll in our new study to determine if there is a difference in means with 95% confidence and 80% power? A. 106 B. 301 C. 187 D. 243
Age-related macular degeneration (AMD) is a common eyedisease among the elderly that can lead to partial or total lossof vision. It is well known that smoking and excessive weighttend to be associated with higher incidence rates of AMD.More recently, however, several genes have been found tobe associated with AMD as well. One gene that has beenconsidered is the Y402H gene. There are three genotypesfor the Y402H gene—TT, TC, and CC. The relationshipbetween AMD and the Y402H genotype is as follows: Y402H AMD=yes AMD=no TT (wild type) 41 380 YC 119 527 CC 121 278 Total 281 1185 (1) What is the relative risk for AMD for the CC genotype compared with the TT genotype?
Researchers studying the link between prenatal vitamin use and autism surveyed the mothers of a random sample of children aged 24 - 60 months with autism and surveyed another separate random sample for children with typical development. Table summarizing the number of mothers in each group who did and did not use prenatal vitamins during the three months before pregnancy (data from Schmidt, 2011) Autism Typical Development Total No vitamin 111 70 181 Vitamin 143 159 302 Total 254 229 483 Complete the hypothesis test for independence between the two variables, use of prenatal vitamins during the three months before pregnancy and autism in Rguroo. What is the value of the test statistic for this test? (Use the Large Sample Z method and please round to two decimal places)
The National Health and Nutrition Examination Study (NHANES) had a random sample of 9317 participants recall their diet over the past 24 hours. The information in this sample was used in a recent study that found that, on average, 57.9% of the calories eaten by participants were obtained from ultra-processed foods that include substances not used in culinary preparations, such as flavors, colors, sweeteners, emulsifiers, and other additives. One of the limitations of the study reported by the authors was the dependence on the dietary recall of individuals. The authors were concerned with: (Choose one and explain why in 1-2 sentances) A) response bias B) undercoverage C) overstratification
A study published in JAMA in 2004 examined past results of other studies on bariatric surgery. Bariatric surgery is done to replace the size of the stomach in various ways. It is typically used on only obese patients, and one the traditional form of the surgery, gastric bypass has a 1% mortality (death) rate caused by surgery. However, in the studies reporting on the effects of the surgery on Type ll diabetes, 1417 of 1846 diabetic patients recovered completely from diabetes after surgery. These patients no longer need medication like insulin (which is injected into the skin) or pills to help manage blood sugar. If you had a morbidly obese relative with diabetes what would you tell him or her about bariatric surgery? Explain. Would you recovered it? Why/ why not?
The drug AZT was the first drug that seemed effective in delaying the onset of AIIDS in people infected with HIV. Evidence for AZT's effectiveness came from a large randomized comparative experiment. The subjects were 1300 HIV-positive volunteers who had not yet developed AIIDS. The double-blind study assigned 435 of the subjects at random to take 500 milligrams of AZT each day and another 435 to take a placebo. At the end of the study, 38 of the placebo subjects and 17 of the AZT subjects had developed AIDS. (a) Calculate and interpret the odds ratio, OR, and the relative risk, RR, for the AZT group compared with the placebo group. (Enter your answers rounded to four decimal places.) RR = OR = How do the values for OR and RR compare? O The OR value is much larger than the RR value which must imply the risk of getting AIDS while not using AZT is much higher. Both values are very easy to interpret since they are quite intuitive. O The OR value is somewhat similar to the RR value but is…
The basic principles of experimental designs are randomization, replication and error or local control. These principles make a valid test of significance possible. Discuss briefly what makes them indispensable requisite to make field experiments valid?
You are conducting a hypothetical retrospective study on use of plastics and prevalence of current medical problems in students. You hypothesize that participants who used more plastic cups in high school will exhibit more medical problems today. You ask all PH1 students to recall how many times they drank out of plastic cups in high school. Your participants struggle to recall this information and end up guessing how often they used plastic drinking containers in high school. Your study design will be negatively impacted by: (select one) A. Misrepresentation B. Recall error C. Negative associations D. Recall bias

Recommended textbooks for you

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

Elementary Statistics: Picturing the World (7th E…

Statistics

ISBN:

9780134683416

Author:

Ron Larson, Betsy Farber

Publisher:

PEARSON

The Basic Practice of Statistics

Statistics

ISBN:

9781319042578

Author:

David S. Moore, William I. Notz, Michael A. Fligner

Publisher:

W. H. Freeman

Introduction to the Practice of Statistics

Statistics

ISBN:

9781319013387

Author:

David S. Moore, George P. McCabe, Bruce A. Craig

Publisher:

W. H. Freeman

SEE MORE TEXTBOOKS