Solve for the sample size: Determine the sample size necessary to estimate the proportion of people shopping at a supermarket in the U.S. that identify as vegan with 95% confidence, and a margin of error of 5%. Some studies estimate that approximately 6% of the U.S. population identify as vegan.

In a random sample of 68 people,17 are classified as​ "successful."   a. Determine the sample​ proportion, p, of​ "successful" people. b. If the population proportion is 0.70​,determine the standard error of the proportion.

In a study of government financial aid for college​ students, it becomes necessary to estimate the percentage of​ full-time college students who earn a​ bachelor's degree in four years or less. Find the sample size needed to estimate that percentage. Use a 0.05 margin of error and use a confidence level of 99​%. Complete parts​ (a) through​ (c) below.

assume that a sample is used to estimate a population proportion p. find the margin of error E that corresponds to the given statistics and confidence level. 98% confidence; the sample size is 730, of which 30% are successes

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.

Find the sample​ size, n, needed to estimate the percentage of adults who have consulted fortune tellers. Use a 0.02 margin of​ error, use a confidence level of 90​%, and use results from a prior poll suggesting that 20​% of adults have consulted fortune tellers.

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 1%. 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.

When asked, "Do kids regularly carry weapons in your school?" 14,250 students said yes, and 115,331 students said no. With a 95% level of confidence, find the margin of error (MOE) associated with the sample proportions. (Give the answer to one decimal place, if needed.)MOE =  %

find the sample size if you have : margin of error =0.02 confidence level =90% p=0.3

online customer service is a key element to successful online retailing. According to a marketing survey, 37.5% of online customers take advantage of online customer service. Random samples of 150 customers are selected. The standard error of all possible sample proportion is?