3. You wish to estimate, with a 99% confidence, the population proportion (p) of U.S adults who made one or more emergency room visits per year. Your estimate must be accurate within 7.5 % of the population proportion. preliminary estimate is available. Find the minimum sample size needed. Find the minimum sample size needed, using a prior estimate that found that 25.1 % of U.S adults made at least one emergency room visit in the past year.

3. You wish to estimate, with a 99% confidence, the population proportion (p) of U.S adults who made one or more emergency room visits per year. Your estimate must be accurate within 7.5 % of the population proportion. preliminary estimate is available. Find the minimum sample size needed. Find the minimum sample size needed, using a prior estimate that found that 25.1 % of U.S adults made at least one emergency room visit in the past year.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

help
may i know the answer??????????
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.
help
You are the operations manager for an airline and you are considering a higher fare level for passengers in aisle seats. How many randomly selected air passengers must you survey? Assume that you want to be 90% confident that the sample percentage is within 5.5 percentage points of the true population percentage. Complete parts (a) and (b) below. a. Assume that nothing is known about the percentage of passengers who prefer aisle seats. (Round up to the nearest integer.) b. Assume that a prior survey suggests that about 38% of air passengers prefer an aisle seat. (Round up to the nearest integer.)
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.
Suppose that you calculated the sample size needed to estimate a population proportion within a given margin of error and the answer came out to n = 115.26. How many items should be sampled? O 115 O 100 O 116 O 115.26
Find the sample size, n, needed to estimate the percentage of adults who have consulted fortune tellers. Use a 0.09 margin of error, use a confidence level of 98%, and use results from a prior poll suggesting that 18% of adults have consulted fortune tellers. n=
You are the operations manager for an airline and you are considering a higher fare level for passengers in aisle seats. How many randomly selected air passengers must you survey? Assume that you want to be 99% confident that the sample percentage is within 1.5 percentage points of the true population percentage. Complete parts (a) and (b) below. Question content area bottom Part 1 a. Assume that nothing is known about the percentage of passengers who prefer aisle seats. n=enter your response here (Round up to the nearest integer.)
Find the sample size needed to determine, with a margin of error of one percent, the percentage of Americans who think North Korea is the greatest foreign threat. Use 90% confidence, and assume about 22% of Americans think that North Korea is the greatest threat.
A pool of 500 Houston residents indicated that 16% of them participated in Women’s March on January 21, 2017. We are interested in figuring out the actual percentage of Houston residents that participated in Women’s March. Please answer the following questions. 1.How large is the population size N? Hint: Provide your best guess. 30,000 80,000 500 600,000 50,000 2. How large is the sample size n? 500 500 × 16% 16 N × 16% (where N is population size) 3. How many possible samples of size 500 can be taken from the population? Hint: Provide your best guess. N (N is population size) More than N (N is population size) 500 choose 16 500