A population of 2,150 people  leave to an interview to find out if they are in favor of a candidate for municipal president. The intention is to know the acceptance towards the candidate and the study  will be done through a sample. What should be the minimum sample size that meets an error standard of 0.02 and a reliability of 90%?

Q: How big of a sample needs to be taken in order to estimate the proportion of children in a community…

A:

Q: a. How large a sample size is necessary if the width of the 95% interval is to be 40? d. What sample…

A: Given Information: The helium porosity is normally distributed with standard deviation of 0.75…

Q: A study is done in sydney to estimate the proportion of people  living there who have travelled…

A: Given: Sample proportion p^=0.28 Confidence interval =0.95 So, α=1-0.95=0.05 Margin of error (E)…

Q: An epidemiologist with the Florida Department of Health needs to estimate the proportion of…

A:

Q: What does brand loyalty mean to consumers? According to a recent research report, 42% of consumers…

A: We have to find the sample size for the given margin of error and proportion.

Q: A 95% confidence interval computed from a sample of size 50 will have a greater margin of error than…

A: A 95% confidence interval computed from a sample of size 50 will have a greater margin of error than…

Q: An epidemiologist with the Florida Department of Health needs to estimate the proportion of…

A: Solution Answer is N= 386

Q: Calculate the 95% and 99% population proportion confidence intervals for this finding.

A: Answer: Given that  the random sample of 100 people  n=100  r=74 The test statistics for population…

Q: Find the critical values, χ L 2 and  χ R 2, used for a 95% confidence interval for the standard…

A: Given: Degree of freedom = 25 α = 1 - 0.95 = 0.05

Q: A sample of size 10 has a sample mean of 1000 and a sample variance of 100. Then a 90% Confidence…

A: We have given that,  Sample mean (x̄) = 1000 and sample variance (s^2) = 100 and sample size (n) =…

Q: Calculate the minimum sample size required in order to make a 95% confidence interval for a…

A:

Q: (b) Estimate the sample size needed if no estimate of p is available. A sample of elementary school…

A: From the provided information, Confidence level = 95% Margin of error = 0.06

Q: A report in a research journal states that the average weight loss of people on a certain drug is 34…

A:

Q: A statistical research yields to the sample proportion of a certain feature in a certain community…

A: Givensample proportion(p^)=0.80Margin of error(E)=0.09Confidence level(α)=90%

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Given, Margin of Error E = 9% = 0.09

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Margin of error = 0.02 When no information is given related to the sample proportion, we assume it…

Q: If the candidate only wants a 3% margin of error at a 95% confidence level,

A: A political candidate has asked you to conduct a poll to determine what percentage of people support…

Q: Find the minimum sample size you should use to assure that your estimate of p will be within a…

A: We have to find sample size required.

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: It is given that the confidence level is 0.90 and margin of error (E) is 0.01.

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Confidence interval for population proportion                                  p^±Z0.90 p^q^n Assume…

Q: A local non-profit group would like to estimate the proportion of residents of Martin county who do…

A: From the provided information, Confidence level = 98% Margin of error = 0.041 Proportion (p̂) = 0.58

Q: Find the smallest sample size needed to estimate the population proportion for a margin of error of…

A:

Q: You measure 20 dogs' weights, and find they have a mean weight of 44 ounces. Assume the population…

A: Since we know population standard deviation, use z-distribution to find z-critical value. Find…

Q: A quality controller wants to estimate the proportion of high quaity goods out of a batch of…

A:

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: We have to find correct answer..

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: When nothin is known about the population proportion, Consider population proportion (p) = 0.50…

Q: If a population has standard deviation 20, what is the minimum sample size to be 95% confident that…

A: Solution: From the given information, confidence level is 0.95, σ=20 and E=4.

Q: A statistical research yields to the sample proportion of a certain feature in a certain community…

A:

Q: An epidemiologist needs to estimate the proportion of residents of St. Lucie county that have been…

A:

Q: Estimate the minimum sample size needed to achieve the margin of error E=0.032 for a 95% confidence…

A:

Q: A local non-profit group would like to estimate the proportion of residents of Okeechobee county who…

A:

Q: An epidemiologist with the Florida Department of Health needs to estimate the proportion of…

A: Given,sample proportion(p^)=0.951-p^=1-0.95=0.05margin of…

Q: Rachel has attempted to standardize a solution and she obtained these replicate concentrations:…

A: Given: 0.1067, 0.1071, 0.1066, 0.1050

Q: It is known that the population range equals 60. With a 95% confidence level, the sample size that…

A:

Q: 6. A hospital wants to estimate the proportion of patients who needed a second visit with a 95%…

A: Here use formula of Margin of error for finding n sample size

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Solution: From the given information, confidence level is 0.995 and E=0.025. Since the proportion…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Given margin of error=6% confidence level=90% so alpha=10%

Q: An epidemiologist needs to estimate the proportion of residents of Indian River county that have…

A: We have to find n sample size of the given data  Margin of error = 0.021 99% confidence interval

Q: An epidemiologist needs to estimate the proportion of residents of Indian River county that have…

A: GivenMargin of error(E)=0.057Confidence interval = 90%

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A:

Q: Find the critical values X7p and X2, for an 80% confidence when the sample size is 51.

A: Find the critical values for chi square , for an 80% confidence when the sample size is 51.

Q: An educator wants to construct a 99% confidence interval for the proportion of elementary school…

A: The random variable is elementary school children in Michigan who are proficient in reading. It…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Given that, Margin of error = 3% = 0.03 99% confidence level

Q: A researcher wishes to estimate the 95% confidence interval of the proportion of students who show…

A: Given  e=Margin of error=30%=0.30,  p^=30%=0.30, level of significance ɑ=0.05

Q: One method for measuring air pollution is to measure the concentration of carbon monoxide, or CO, in…

A: Solution: The margin of the error for the confidence interval for the can be calculated by using the…

Q: epidemiologist needs to estimate the proportion of residents of St. Lucie county that have been…

A: The margin of error is 0.026.

Q: a) Find a 90% confidence interval estimate for the mean college football score if a sample of 100…

A: a) Given data, σ=6n=100x=46z-value at 90% confidence is Zc=1.645

Q: A statistical research yields to the sample proportion of a certain feature in a certain community…

A:

Q: Given that the population standard deviation is 1, determine the minimum sample size needed in order…

A: Given : population standard deviation = σ = 1 margin of error = E = 0.2 level of confidence = 95% At…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.