An epidemiologist with the Florida Department of Health needs to estimate the proportion of Floridians who are infected with the corona virus but are asymptomatic (show no signs of the virus). The epidemiologist compiled a preliminary random sample of infected patients and found that 67% of the sample were also asymptomatic. How large a sample should be selected such that the margin of error of the estimate for a 96% confidence interval is at most 4.91%. Round the solution up to the nearest whole number. N=

Q: A company manufacturing some medicine tablets with the Average weight of 500 mg and population…

A: The sample size is 50, sample mean is 504.5, population mean is 500, and population variance is 36.…

Q: A manager needs to know the proportion of employees who have insurance. He selects 200 employees and…

A:

Q: Controls 2.4 0.0 0.9 -0.2 1.0 1.7 2.9 -0.6 1.1 -0.1 0.3 1.2 -1.6 -0.1 -1.5 0.7 -0.4 2.2 -0.4 -0.4…

A: 1) The stem and leaf plot is Control   Breast-feeders   -8 3   -7 8,0   -6 8,8,5,5,2   -5…

Q: Create a 95% confidence interval for the proportion of U.S. adults who live with one or more chronic…

A: Here Given proportion of Us adults report that they live with one more chronic conditions=P¯=0.45…

Q: A technician randomly sampled repair logs for computers at a university. He wanted to find out how…

A: It is given that the proportion of computers that were repaired more than three times in the last…

Q: A company that manufactures baseball bats believes that its new bat will allow players to hit the…

A: Let X represents the hitting distance for new model and Y represents the hitting distance for old…

Q: A poll of 827 students at Alpha state college found that 61% of those polled preferred a quarter…

A: It is given that the proportion of the students who preferred a quarter system to a trimester…

Q: Adrenomedullin and pregnancy loss. The plasma levels of adrenomedullin for 38 women with recurrent…

A:

Q: A researcher wanted to check whether the percentage of Canadian adults with obesity has decreased in…

A: Number of Canadian adults in 2005= 75 Number of Canadian adults in 2009 = 120   significance level =…

Q: sample standard deviation of $74.50. a. Develop a  95% confidence interval estimate of the mean…

A: The sample size, i.e., the sampled number of families, n=64.The sample average spent amount(in $)…

Q: In a sample of 40 water specimens taken from a construction site 26 contained detectable level of…

A: According to the provided information, sample size (N)=40 number of favorable cases (X) = 26 The…

Q: In a recent year, a sample of the South American Redeye Piranha was collected by fishermen on a…

A: We have to interprete data.

Q: Find the critical value Z a/2 for the 92% confidence interval.

A: We have given information, The confidence level is C=0.92. Here we have to obtain critical value of…

Q: How large would the sample need to be so that a 95% confidence interval would have a margin of…

A:

Q: In a clinical trial, 50 patients who received a new medication are randomly selected. It was found…

A: Solution: Let X be the number of patients suffered serious side effects from this new medication and…

Q: Determine the sample size needed to create a 99%

A: Given that  Margin of error =E =0.05 The confidence level is 99%. The sample proportion can be taken…

Q: In a test of physical fitness, a fitness trainer for a group of men ages 65 and older from a local…

A: The population mean is known to be 20. Based on the sample evidence you have to test whether the…

Q: A survey conducted by the American Automobile Association (AAA) showed that a family of four spends…

A: Given that: Population mean, μ=215.60 n = 64 x¯=252.45 s = 74.50

Q: A company that produces cell phones claims its standard phone battery lasts longer on average than…

A: Given data : Time : { 34,34,35,31,30,34,30,35,33,55,30,32 } To make histogram first write down the…

Q: Find the margin of error that corresponds to a sample of size 210 with 70% successes at a confidence…

A: Sample size is 210. Percentage of successes is 70%. Percentage of confidence level is 90%.

Q: Construct a 95% confidence interval for the proportion of all mechanically ventilated patients at…

A: From provided information, a study examined patients who were mechanically ventilated in intensive…

Q: In a previous study, it was found that p-hat=0.68 for a particular sample. Suppose we would like to…

A:

Q: You are working as an assistant to the dean of institutional research at your university. The dean…

A: The question is about confidence interval Given : Randomly selected no. of graduates ( n ) = 100…

Q: Glaucoma is a leading cause of blindness in a certain country. An ophthalmologist measured the…

A: A confidence interval is a numeric value that a researcher will be reasonably confident in and…

Q: Find the critical value tc for a 90% confidence level when the sample size is 24. Use Table 4 on…

A: Given, n = 24 α = 0.1

Q: You are working as an assistant to the dean of institutional research at your university. The dean…

A:

Q: The data below are yields for two different types of corn seed that were used on adjacent plots of…

A: From the provided information, Confidence level = 95% The difference table can be constructed as:…

Q: company manufactures a certain over-the-counter drug. The company samples 80 pills and finds that…

A: We have given that  Sample size n = 80 Sample mean = 325.5 Standard deviation s=10.3 90%confidence…

Q: A survey conducted by the AAA showed that a family of four spends on average $215.60 per day while…

A: It is given that sample mean is 252.45 and the standard deviation is 74.50.

Q: Allen's hummingbird has been studied by zoologist Bill Alther. Suppose a small group of 16 Allen's…

A:

Q: A small business wanted to estimate the mean income from their customers. They took a sample of 256…

A: We have to find  the 90% confidence interval estimate for the population mean income of their…

Q: Allen's hummingbird has been studied by zoologist Bill Alther. Suppose a small group of 15 Allen's…

A: Given,sample size(n)=15sample mean(x)=3.15standard deviation(σ)=0.22α=1-0.80=0.2α2=0.1Z0.1=1.2816

Q: Results from the National Health and Nutrition Examination Survey (NHANES) conducted thirty years…

A:

Q: n a trial of 350 patients who received 10-mg doses of a drug daily, 49 reported headache as a side…

A: 350 patients who received 10-mg doses of a drug daily; n=350 49 reported headache as a side effect;…

Q: With data from the 2009 National Health Interview Survey, the Centers for Disease Control estimated…

A: The sample proportion is 0.12 and the standard error is 0.013.

Q: In a random sample of 250 students who enrolled in Science, 150 took notes during classes. Find an…

A: Given that n=250,x =150,alpha =0.05 Find an approximate 95% confidence interval for the population…

Q: Take an SRS where n equals 50 and calculate at 95% confidence interval. If we took a different SRS…

A: Sample size Confidence level is 95%If we took a different SRS of the same size (50) from the same…

Q: How large of a sample needs to be taken

A: It is given that Confidence level = 98%Margin of error, E = 1.5% = 0.015