Suppose that a COVID-19 vaccine is 100% effective and Ro of COVID-19 is 2.5. What is the percentage of the population that needs to be fully vaccinated to reach herd immunity?
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Q: Most cases of cervical cancer are linked to a few strains of the human papilloma virus (HPV). The…
A: given data women : n1 = 100p^1 =0.24x1 =n1* p^1 = 100(0.24) = 24n2 = 100p^2 = 0.34x2 = n2*p^2 =…
Q: The accompanying table shows the percentage of people with 2 dosage of Covid vaccine administered.…
A: Given data:
Q: Suppose we want to study the effect of smoking on lung capacity in women. Match the study to…
A: The observational studies are the one in which we only observe but not interfere or introduce…
Q: An aircraft emergency locator transmitter (ELT) is a device designed to transmit a signal in the…
A:
Q: Most cases of cervical cancer are linked to a few strains of the human papilloma virus (HPV). The…
A: Given: n1 = 100 p1 = 0.34 n2 = 100 p2 = 0.44 α = 0.05 Formula Used: Test-statistic Z =…
Q: Most cases of cervical cancer are linked to a few strains of the human papilloma virus (HPV). The…
A: Assume that p1, p2 are the population proportions of women who developed cervical cancer in the…
Q: the proportion, p, of people who find relief is lower than 63%.
A: Given : n=215 , X=125 , p0=0.65 , α=0.05 We want to test the claim that the proportion , p of people…
Q: The Virginia Department of Health publishes COVID-19 vaccination data on their website. As of…
A: (1) For Fair fax country n=14, p=3750,q=1350 mean=np =14x3750=10.37 variance=npq…
Q: Most cases of cervical cancer are linked to a few strains of the human papilloma virus (HPV). The…
A: Assume that p1, p2 are the population proportions of women who developed cervical cancer in the…
Q: An antidepressant has historically been known to relieve depression for 80% of patients who use the…
A:
Q: The impact of a low-calorie diet on laboratory mice's longevity is being investigated by a medical…
A: Given the data as Group E Group F 900 1037 907 905 751 1023 833 988 920 1078 787 1011…
Q: An antidepressant has historically been known to relieve depression for 80% of patients who use the…
A: a) Suppose p is the true population proportion of people with depression, who use the new version of…
Q: study, a team of researchers recruited 38 men and divided them randomly into two groups - treatment…
A: From the study we can infer, This is an experimental study. The patients were blinded to the…
Q: Researchers suspect that drinking tea might enhance the production of interferon gamma, a molecule…
A: Formula :
Q: Independent studies show that 26 out of 40 r/s full-time students favor a shorter semester system,…
A: Givenx1=26n1=40x2=38n2=50confidence level=98%
Q: A study published in JAMA in 2004 examined past results of other studies on bariatric surgery.…
A: In the studies reporting on the effects of the surgery on Type ll diabetes, 1417 of 1846 diabetic…
Q: Most cases of cervical cancer are linked to a few strains of the human papilloma virus (HPV). The…
A: From the provided information, n1=100p^1=0.24n2=100p^2=0.34 Level of significance (α) = 0.10
Q: A random sample of 1200 apples was taken from a large consignment and found that 10% of them are…
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Q: A study published in JAMA in 2004 examined past results of other studies on bariatric surgery.…
A: Introduction: Denote p as the true proportion of Type ll diabetic patients who recovered completely…
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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…It was reported that some sixty-seven percent of Covid 19 infection, over one summer month in a European country, were people who were fully vaccinated. Does this mean that Covid 19 vaccine is ineffective?The impact of a low-calorie diet on laboratory mice's longevity is being investigated by a medical researcher. Twenty mice are split into two groups (E and F) by random. A typical diet is given to Group E, while Group F is given a diet that only contains 70% as many calories as Group E's diet. The length of life (in days) of each mouse over the 36-month trial is documented. Table 2 provides the data that was obtained. The symbol of double star (**) signifies that the mouse was still alive at the end of the investigation. (a) (b) (c) Table 2: The length of life (in days) of each mouse Group E 900 907 751 833 920 787 830 877 848 901 Group F 1037 905 1023 988 1078 1011 ** 1063 898 1033 State a suitable null and alternative hypotheses for the problem. At 5% significance level, test the hypotheses in part (a) by using an appropriate nonparametric test. Write your conclusion.
- Suppose we want to study the effect of smoking on lung capacity in women. Match the study to experimental or observational. Find 100 women age 20 who do not currently smoke. Randomly assign 50 of the 100 women to the smoking treatment and the other 50 to the no smoking treatment. Those in the smoking group smoke a pack a day for 10 years while those in the control group remain smoke free for 10 years. Measure lung capacity for each of the 100 women. Find 100 women age 30 of which 50 have been smoking a pack a day for 10 years while the other 50 have been smoke free for 10 years. Measure lung capacity for each of the 100 women. Analyze, interpret, and draw conclusions from data.It has been found that 1 in 12 inpatients is exposed to MRSA, an infectious bacterial species that is resistant to treatment with antibiotics. Out of a sample of 60 patients, how many do you expect have been exposed to this bacteria?The Virginia Department of Health publishes COVID-19 vaccination data on their website. As of 10/5/2021, 60.6% of the population of Virginia is fully vaccinated. This rate varies drastically from county to county. Specifically, Fairfax County’s full vaccination rate is 74% and Lee County’s full vaccination rate is 40%. A researcher took a random sample of 14 individuals from Fairfax County and another random sample of 14 individuals from Lee County and asked them whether they could verify that they are fully vaccinated. Each sample was selected in a single day. 1. Calculate the mean and standard deviation of the number of individuals from Fairfax County and Lee County in this sample who are fully vaccinated. Show your work using the binomial mean and binomial standard deviation formulas and provide your two means and two standard deviations in your document. Round your answers to two decimal places. (It is not necessary to use StatCrunch for this part.) 2. Calculate the probability…
- 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?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=2000According to U.S. government statistics, mononucleosis (mono) is four times more common among college students than the rest of the population. Blood tests for the disease are not 100% accurate. Assume that the following table of data was obtained regarding students who came to a certain school's health center complaining of tiredness, a sore throat, and slight fever. Has Mono Doesn't Have Mono Totals Positive Blood Test 19 44 63 Negative Blood Test 46 29 75 Totals 65 73 138 If a student is selected from this group, find the probability that the test is positive, given that the student has mono.
- In a 2009 study, a team of researchers recruited 38 men and divided them randomly into two groups - treatment or control. The also recruited 38 women and they randomly placed half the participants into the treatment group and the other half into the control group. One group was given 25 grams of chia seeds twice a day, and the other was given a placebo. The subjects volunteered to be a part of the study. After 12 weeks, the scientists found no significant difference between the groups in appetite or weight loss. Which of the following is true. (i) This is an observational study (ii) Blinding is used in this study because subjects in the control group recieved a placebo, so that htey were blinded to the treatment they recieved. (iii) We can safely generalize the conclusion (that chia seeds have no significant effect on appetite or weight loss) from the participants to the population at large because randomization is used when assigning participatns to groups.Independent studies show that 26 out of 40 r/s full-time students favor a shorter semester system, while 38 out of 50 r/s part-time students favor the same. Construct a 98% c.i. for the difference between the overall percentage of full-time students favoring a shorter semester system and that of part-time students.Most cases of cervical cancer are linked to a few strains of the human papilloma virus (HPV). The pharmaceutical company Merck developed a vaccine (Gardisil) against these HPV strains. Worldwide clinical trials followed young women after vaccination or administration of placebo for two to four years for signs of HPV-caused cervical cancer. Based on a sample of 100 women in the Gardisil group, 34 % developed cervical cancer, and based on a sample of 100 women in the placebo group, 44 % developed cervical cancer. Test the claim that the proportion of women who developed cervical cancer in the Gardisil group is less than the proportion of women who developed cervical cancer in the placebo group at a = 0.05. Round your answers to three decimal places, and round any interim calculations to four decimal places. Fill in the hypotheses below where p₁ denotes the proportion of women who developed cervical cancer in the Gardisil group and p2 denotes the proportion of women who developed cervical…