On a random cross medical checkup in Muscat airport the statistic shows 45% of the travelers are form region A, 35% are form region B, and 20% are form region C. The Medicine doctors have found that 6%% of the travelers fom region A. 7% of the travelers form region B. and 5% of the travelers form region C are infected by COVID-19. One week later, not infected traveler went for recheck-up Find the probability helshe region 8? For the tonnlhar

On a random cross medical checkup in Muscat airport the statistic shows 45% of the travelers are form region A, 35% are form region B, and 20% are form region C. The Medicine doctors have found that 6%% of the travelers fom region A. 7% of the travelers form region B. and 5% of the travelers form region C are infected by COVID-19. One week later, not infected traveler went for recheck-up Find the probability helshe region 8? For the tonnlhar

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Let's assume that the COVID-19 new case report data were collected from S.A Ministry of Health 30th of December 2019 was the first date that COVID-19 was confirmed in S.A. The time period of data was from the 20th of January to the 27th of January 2020 (for the last 7 days). The data included the total number of new cases, date of recorded, number of new total COVID-19 cases. In this study, a medical researcher used Pearson's cortelation analysis and the linear regression model to predict COVID-19 new cases based on the available data. (e.g., that Cases of infection rises linearly with number of people tested). The best-known types of regression analysis are the following: Date Day Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sunday Test No. Case Counts 2020/01/20 2020/01/21 2020/01/22 2020/01/23 2020/01/24 2020/01/25 2020/01/26 2020/01/27 6. 33 41 17 1 18 3. 13 44 Calculate the coefficient of correlation using the Karl Pearson method. O A. 1 OB. 0.1356 OC. 0.9239 OD.…
The culinary herb cilantro, Coriandrum sativum, is very polarizing: some people love it and others hate it. A genetic component is suspected in this phenomenon. A survey of American adults of European ancestry found that 1129 of 7295 women and 865 of 7309 men said that cilantro tastes soapy. We want to know if women and men in this population differ in how they perceive the taste of cilantro. What is the pooled sample proportion of women and men who say that cilantro tastes soapy? Conduct a hypothesis test, and state the test statistic and p-value and give the conclusion. How much differ? Construct a 95% confidence interval for the difference of the proportions of women and men who say that cilantro tastes soapy. Interpret your interval in the context.
A researcher would like to know whether there is a consistent, predictable relationship between verbal skills and math skills for high school students. A sample of 200 students is obtained, and each student is given a standardized English test and a standardized math test. Based on the test results, students are classified as high or low for verbal skills and for math skills. The results are summarized in the foll ng table: High Verbal Low Verbal High Math 59 41 100 Low Math _31 69 100 90 110 200 1. Based on these results, can the researcherconclude that there is a significant relationship between verbal skills andmath skills? Test at the .05 level of significance. 2. State the research hypotheses 3. Identify the critical value 4. Calculate the test statistic 5. Evaluate the null hypothesis
Complaints about an Internet brokerage firm occur at a rate of 4 per day. The number of complaints appears to be Poisson distributed. A. Find the probability that the firm receives 5 or more complaints in a day. Probability = B. Find the probability that the firm receives 13 or more complaints in a 3-day period. Probability =
The population of children under 5 years in Whitefish, Montana on July 1 2015 was 2,350 with no population change reported for the next year. In that year, in a daycare of 150 children under 5 years in Whitefish, Montana, 50 of them develop Respiratory Syncytial Virus (RSV). During the next 3 months, 8 of the children with RSV died with 5 of them being reported to be associated with RSV infection. No other deaths were reported among children under 5 years in this town. The incidence of RSV would be [Select the option closest to your answer] A. 0.02% B. 2.2% C. 33.3% D. 3.3%
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ific Calculator Of30shg/ckivdfk1p00003g5tgeftOid1 Agroup of researchers in New York wants to test if there is any relationship between living in California and preferring warm weather to cold weather. The researchers send out an online questionnaire to 200 randomly chosen people in the US asking several questions including: "Do you live in California?" and "Do you prefer warm weather to cold weather?". The results are summarized in the table below: Prefers Warm Weather 80 Prefers Cold Weather 42 Lives in California Doesn't Live in California 35 43 Test the null hypothesis that the choices on these two questions are independent versus the alternative that they are dependent. What are the p-value and conclusion of this test if the test is performed at the alpha =0.1 level? %3D p-value = 0.0091; Fail to reject the null hypothesis %3D p-value = 0.0039; Reject the null hypothesis p-value = 0.0039; Fail to reject the null hypothesis p-value = 0.0911; Reject the null hypothesis NEXT
The BinaxNOW COVID-19 antigen test is sold as an in-home test. Pollack et al. (2021) estimate that amongasymptomatic adults, the test has a 70.2% sensitivity and 99.6% specificity. Assume for this question that 8% of peoplewho use this test actually have the disease.a) Draw a tree diagram representing this situation.b) What proportion of tests given to asymptomatic people will be true positives?c) What proportion of tests given to asymptomatic people will be true negatives?d) What is the probability that an asymptomatic person who tests positive truly does have COVID-19?“Fun” fact: this probability is called the positive predictive value.e) What is the probability that an asymptomatic person who tests negative truly does not have COVID-19? Thisquantity is called the negative predictive value.
An investigator analyzed the leading digits from 794 checks issued by seven suspect companies. The frequencies were found to be 218, 130, 106, 83, 65, 48, 48, 37, and 59, and those digits correspond to the leading digits of 1, 2, 3, 4, 5, 6, 7, 8, and 9, respectively. If the observed frequencies are substantially different from the frequencies expected with Benford's law shown below, the check amounts appear to result from fraud. Use a 0.025 significance level to test for goodness-of-fit with Benford's law. Does it appear that the checks are the result of fraud? Leading_Digit Actual_Frequency Benford's_Law:1) 218 30.10%2 )130 17.60%3) 106 12.50%4) 83 9.70%5) 65 7.90%6) 48 6.70%7) 48 5.80%8) 37 5.10%9) 59 4.60% Calculate the test statistic, χ2 =? (Round to three decimal places as needed.) Calculate the P-value=? (Round to four decimal places as needed.)
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…
I'm studying for my final tomorrow morning and I am struggling with this review question.