A researcher wishes to be 95% confidence that her estimate of the true proportion of individuals who travel overseas is within 4% of the true proportion. Find the sample size necessary if in a prior study, a sample of 500 people showed that 200 traveled overseas last year.

Q: Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If…

A: Given information Error = 4% = 0.04 Confidence level = 0.95

Q: A study found that 73% of elementary students buy lunch at school at least once a month. How large a…

A: Given,sample proportion(p^)=0.73margin of error(E)=0.03α=1-0.95=0.05α2=0.025Z0.025=1.96       (from…

Q: If we want to be within 0.02 of the true proportion of homes that have a direct television receiver…

A: The population proportion is 82%, the confidence level is 98% and estimate is within 0.02.…

Q: Kim wants to determine a 80 percent confidence interval for the true proportion of high school…

A: Given: Margin of error, E=0.04 Confidence level=80%

Q: Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If…

A: Given information Error = 2% = 0.02 Confidence level = 0.95

Q: Suppose you calculate a 99% confidence interval to be: 13.05 to 20.75. Determine the margin of error

A: Given data: The given upper limit is b=20.75. The given lower limit is a=13.05.   The expression for…

Q: Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If…

A:

Q: If you knew that a study reported that 73% of pre-kindergarten children ages 3 to 5 whose mother had…

A:

Q: According to Randall Financial, through April 25, 2018, 64% of companies reported profits had…

A: The proportion is 0.64, margin of error is 0.05, and confidence level is 95%. Computation of…

Q: Use z =2.576 If the margin of error for the population mean for 99% Confidence Level is 39, what…

A:

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

A:

Q: By means of a pilot survey, it is already known that the proportion of residents in opposition to…

A: Formula for sample size is,

Q: An automotive manufacturer wants to know the proportion of new car buyers who prefer foreign cars…

A:

Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: Solution: From the given information, confidence level is 0.96 and E=0.02.

Q: Suppose you survey a random sample from a large population to understand the population proportion.…

A: Given information- Margin of error, E = 6% = 0.06 Confidence level, c = 98% Since nothing is known…

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny . What…

A: A) Sample size obtained when he uses a previous estimate of 32%. As given he wishes the estimate to…

Q: 4. The Department of the Treasury is interested in finding out what proportion of people support…

A: Given that  Population proportion p=15%=0.15 Margin of error =E =2%=0.02 95% confidence.  NOTE:-…

Q: Suppose that a 95% confidence interval for a population p = the population proportion of men who…

A:

Q: If the candidate only wants a 6% margin of error at a 99% confidence lev

A: Given that, The margin of error (E) is 0.06. Assume that p as 0.5.

Q: 4.An internet service provider wishes to estimate, to within one percentage error, the current…

A: Given : Margin of error (E) = 1% = 0.01 Confidence level = 85% So , significance level (α) = 15% =…

Q: If n=270 and p (p-hat) =0.93, find the margin of error at a 90% confidence level Give your answer to…

A:

Q: If the Census wants to increase its level of confidence and keep the error bound the same by taking…

A: Given information: The census wishes to increase the level of confidence (c). The error bound (MoE)…

Q: If n=200 and ˆpp^ (p-hat) =0.39, find the margin of error at a 99% confidence level

A: Find z-critical value:…

Q: An investigator computes a 95% confidence interval for a population mean on the basis of a sample of…

A: To find half of width, We need to calculate 4 times the sample Size.

Q: If n=570 and ˆpp^ (p-hat) =0.8, find the margin of error at a 95% confidence level

A: given that, n = 570 p^=0.8 confidence level = 95%

Q: A researcher wishes to estimate the proportion of adults who have high-speed internet access. What…

A:

Q: If you knew that I study reported that 67% of pre-kindergarten children ages 3 to 5 whose mother had…

A:

Q: Suppose you survey a random sample from a large population. How large must your sample be if you…

A: According to the provided data, the margin of error is 0.06 and the confidence level is 0.98. Since,…

Q: A researcher wants to do a study to see what the proportion of vaccinated people is in a certain…

A:

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: It is given that there is 95% confidence.

Q: f n=300 and ˆpp^ (p-hat) =0.18, find the margin of error at a 99% confidence level Give your answer…

A:

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: Solution: From the given information, confidence level is 0.99, p=0.25 and E=0.03.

Q: A company wants to estimate, at a 95% confidence level, the proportion of all families who own its…

A:

Q: In a survey conducted by CNN, 130 of the 250 people that were randomly surveyed have a savings…

A: Given data, n=250 x=130 Sample proportion p=x/n =130/250=0.52 z-value at 90% confidence is Zc=1.645

Q: The same Gallup poll asked its 1523 adult respondents and also 501 teens (ages 13 to 17) whether…

A: No. of adult respondents=1523 No. of teen respondents=501 Percentage of adults responding yes to…

Q: In a​ poll, 51​% of the people polled answered yes to the question​ "Are you in favor of the death…

A: Let p denote the proportion of people answered yes to the question. Let E denote the margin of…

Q: A pollster wants to conduct a pre-election poll with a margin of error of 2.5% and a 95% confidence…

A: We have given that,  Margin of error (E) = 2.5% = 0.025 and confidence level = 95%  Then, We will…

Q: ) Beth wants to determine a 90 percent confidence interval for the true proportion of high school…

A:

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

A:

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny What size…

A:

Q: Through polling, it was estimated that the percent of people who will vote for a particular…

A: Given information Percentage of people who will vote in a upcoming election p-hat = 36.2% Margin of…

Q: For the same sample statistics, which level of confidence would produce the widest confidence…

A:

Q: Suppose we estimated that 68 percent of Santa Fe students believe that black coffee is disgusting.…

A:

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny . What…

A:

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: a) Given that: p= previous estimate = 32% =0.32 e= error= 3%=0.03 z=critical value for confidence…

Q: A college believes that 26% of applicants to that school have parents who have remarried. How large…

A:

Q: A researcher wishes to estimate the proportion of adults who have​ high-speed Internet access. What…

A: Given information: Margin of error(E)=0.03. Confidence level= 90%. α=1-0.90  =0.10 Zα2=Z0.102…

Q: A congressperson wants to estimate the proportion of people in her district that think she is doing…

A:

Q: If n=360 and ˆp(p-hat) =0.69, find the margin of error at a 95% confidence level

A:

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.