A pollster wishes to estimate, with 90% confidence, the proportion of people who believe the United States should pursue a more aggresive foreign policy. Find the minimum sample size necessary to achieve a margin of error of less than 2%. Assuming no previous estimates are available. Round your answer up to the next integer. Assuming a previous estimate of 0.25. Round your answer up to the next integer.

Q: You want to obtain a sample to estimate a popu time, you have no reasonable preliminary estimation…

A:

Q: An online news source reports that the proportion of smart phone owners who use a certain operating…

A: Here we need to find the mean of the sampling distribution. Here it is given that the sample size is…

Q: A pollster wishes to estimate, with 99% confidence, the proportion of people who believe that recent…

A: Given data, E=2%=0.02 z-value at 99% confidence is Zc=2.576

Q: According to a Gallup poll taken on September 10th, 1998, 31% of a sample of adults thought that…

A: Sample size = sample size is the number of completed responses your survey receives or (randomly…

Q: What is the sampling error for an estimate of the population proportion, p = 0.36, if the true…

A: We have to find the sampling error for an estimate of the population proportion

Q: You want to estimate the percentage of adults who believe that passwords should be replaced with…

A: Given,margin of error(E)=0.041α=1-0.95=0.05α2=0.025Z0.025=1.96

Q: Assume that a samlpe is used to estimate a population proportion p.  Find the margin of error E that…

A: Given that n=sample size=800p=probability of success=40%=0.40z= critical value for 98% confidence…

Q: A sociologist plans to conduct a survey to estimate the percentage of adults who believe in…

A: Given thatMargin of error (E) = 4% = 0.04Significance level (α) = 1 - 0.99 = 0.01

Q: 2. Let sample proportion . How large a sample should be taken to be 95 % sure that the error of…

A: Let proportion be p=0.50 E=0.02 z-value at 95% confidence is Zc=1.96 n=?

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: a)  Given,            Margin of Error ∈=0.055            Assume P∧=0.5            and…

Q: You are the operations manager for an airline, and you are considering a higher fare level for…

A:

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: Margin of error =E =0.025 Population proportion p=38%=0.38

Q: Determine the minimum sample size needed if we want to estimate the population percent of students…

A:

Q: How many randomly selected employers must we contact in order to create an estimate in which we are…

A:

Q: A researcher wishes to estimate, with 93% confidence, the percentage of people who own a home…

A:

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: Given : confidence : 99% Margin of error = 2.5

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: Given,margin of error(E)=0.055

Q: A pollster wishes to estimate, with 99% confidence, the proportion of people who believe that recent…

A: Introduction: The 100 (1 – α) % confidence interval for the population proportion, p is: Here, n is…

Q: From the sample statistics, find the value of p1 - p2, the point estimate of the difference of the…

A: From the provided information,

Q: The Google Play app store for smartphones offers hundreds of games to download for free or for a…

A: Standard error is calculated by dividing the standard deviation and the sample size. It is denoted…

Q: A financial analyst wants to understand the preference of the people investment strategy. A randomly…

A: Given Information: Alternative Hypothesis H1:P2010<P2015 2010: Sample size (n1) = 400 Out of…

Q: What is an outlier?

A: We have to describe the outlier. Outlier can be present in any dataset.

Q: You want to estimate the percentage of adults who believe that passwords should be replaced with…

A: a. Suppose p is the true proportion of adults who believe that passwords should be replaced with…

Q: A two-tailed test is one where: Select one: a. results in only one direction can lead to rejection…

A: Answer :  (c) results in either of two directions can lead to rejection of the null hypothesis.

Q: Researchers at a drug company are testing the duration of a new pain reliever. The drug is normally…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: According the April 12, 2017 Pew Research survey, 58% of Americans approve of U.S. missile strikes…

A: (3) Determine whether the normal approximation can be used with the given distribution or not?…

Q: Suppose you would like to estimate, with 97% confidence, the proportion of computers that need…

A: It is given that the level of confidence is 97% and desired margin of error E is 0.035.The formula…

Q: In a study of government financial aid for college students, it becomes necessary to estimate the…

A:

Q: A pollster wishes to estimate, with 99% confidence, the proportion of people who approve of how…

A: From the provided information, Confidence level = 99% Margin of error = 0.03

Q: Compute the point estimate for the difference between the means. Report the standard error of the…

A: Given that n1=15, n2=12

Q: A pollster wishes to estimate, with 99% confidence, the proportion of people who believe that rece…

A: It is given that margin of error (E) is 0.01 and the confidence level is 99%.

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A:

Q: Suppose the President wants an estimate of the proportion of the population that support his current…

A: Given dataError = 4% = 0.04Confidence level = 0.95Significance level = α=1-0.95=0.05

Q: A researcher would like to estimate the proportion of home-based businesses owned by women. What is…

A: Confidence interval = 80 % Margin of error = 2.4% We have to find the sample size = ?

Q: A pollster wishes to estimate, with 95% confidence, the proportion of people who believe that recent…

A: a) Assume p-hat as 0.5, since no preliminary estimate is available.

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: Suppose p is the true population proportion of air passengers who prefer aisle seats.

Q: You want to estimate the percentage of adults who believe that passwords should be replaced with…

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.