An epidemiologist wants to estimate the proportion of residents in her city that carry the Hepatatis A virus. It is thought that the proportion is approximately 61%. How large a sample of residents should be taken to estimate the proportion who carry the Hepatitis A virus to within 5 percentage points with 90% confidence? In your calculation, please use the critical value rounded to 3 decimal places. Hint: Make sure that you round up to the next integer.

Q: Your professor wishes to estimate the proportion of high school students enrolled in college-level…

A: Given: margin of error of 3.5 percent 99% confidenp p= 18.3%

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: From provided information; Margin of error M.E = 4.5% that is 0.045 Confidence level= 90% The z…

Q: ou want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A:

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A:

Q: Many athletes (and their parents) worry about the risk of concussions when playing sports. A…

A: First let us sort the head circumferences (in inches) for the players on the team; No. Head…

Q: you want to obtain a sample to estimate a population proportion. based on previous evidence, you…

A:

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: From the given information,   Margin of error E= 0.01 Population proportion p= 0.33 Confidence level…

Q: A rare birth defect occurs in approximately 0.5% of all cases in males. If we sample all the males…

A: Given information: The total number of males born in 2016 in a specific region is N = 200,000. It is…

Q: In a random sample of 73 items produced by a machine, the quality control staff found 25 of them to…

A: Sample proportion is always a point estimate of population proportion

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: According to the provided information, Proportion is unknown. So, worse case proportion is 50%. p =…

Q: researcher wishes to estimate the proportion of the adult population of the U.S. has sleep…

A: E=0.03 99% confidence interval for z=2.576 p=0.5

Q: In a survey of 323 adults over 50, 60% said they were taking vitamin supplements. Find the margin of…

A:

Q: uct a survey on your college campus to learn about the political awareness of students. You want to…

A: The critical value from standard normal table at 95% confidence level will be:

Q: The mean GPA for 138 residents of the local apartment complex is 1.9. What is the best point…

A: Solution: From the given information, the mean GPA for 138 residents of the local apartment complex…

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: Given: The margin of error E=0.05 Confidence level = 90% Since the population proportion is not…

Q: what range of raw scores makes up the middle 40%

A: The middle 40% means, the scores lie between 30th and 70th percentile. From stand normal, z-score…

Q: You want to estimate the percentage of small incorporated businesses that are owned by women. A…

A: The random variable percentage of small incorporated businesses follows binomial distribution. The…

Q: You would like to estimate the proportion of all residents in favor of a new law with 98%…

A: The sample proportion is 0.30, margin of error is 0.06, and the confidence level is 98%. Computation…

Q: ou conduct a cross-sectional study of  800 patients to test a new screening tool for diabetes. In…

A: Given information: The number of patients who had false negative and false positive screens is 42,…

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: sample size n=?

Q: (a) Draw a scatter diagram treating MRI count as the explanatory variable and IQ as the response…

A: Here Dependent variable (y) = Mental capacityIndependent variable (x) = MRISample size (n) = 10

Q: A researcher wanted to estimate the proportion of undergraduate college students (18– 29 years) with…

A:

Q: Suppose a government department would like to investigate the relationship between the cost of…

A: The data shows the a random sample of 10 homes heating cost and square footage.

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: Given that  there is no reasonable preliminary estimation for the population proportion. Let p=0.5…

Q: The distances golf balls travel under laboratory testing conditions are normally distributed. The…

A:

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A:

Q: ou want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A:

Q: A histological test for cancer has sensitivity, specificity, positive predictivity, and negative…

A: To find, Which of the four indicators would you use to reassure a patient that the positive result…

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: Given information Error = 2% = 0.02 Assuming Population proportion p = 0.5 Confidence level = 0.95

Q: A researcher wanted to estimate the proportion of undergraduate college students (18– 29 years) with…

A: