A survey asked, "How important is it to you to buy products that are made in America?" Of the 600 Americans surveyed, 450 responded, "It is important." For each of the following levels of confidence, find the sample proportion and the margin of error associated with the poll. (Round the margin of error to one decimal place.) (a) an 85% level of confidence sample proportion _ margin of error ± _ % (b) a 98% level of confidence sample proportion _ margin of error ± _ %

A survey asked, "How important is it to you to buy products that are made in America?" Of the 600 Americans surveyed, 450 responded, "It is important." For each of the following levels of confidence, find the sample proportion and the margin of error associated with the poll. (Round the margin of error to one decimal place.) (a) an 85% level of confidence sample proportion _ margin of error ± _ % (b) a 98% level of confidence sample proportion _ margin of error ± _ %

Name: A survey asked, "How important is it to you to buy products that are m
Uploaded: 2024-03-20T07:07:00.000Z
Channel: Bartleby
Description: A survey asked, "How important is it to you to buy products that are made in America?" Of the 600 Americans surveyed,450 responded, "It is important." For each of the following levels of confidence, find the sample proportion and the marginof error a

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

Related questions

Q: The confidence interval for a population porportion is (0.34, 0.52). What is the sample proportion…

A: From the provided information Confidence interval is (0.34, 0.52)

Q: How many students should be sampled in order to be 90% confident in estimating the proportion in…

A: Given that Margin of error =E =0.10 90% confidence.

Q: What sample size should be obtained if he wants to be within 4 percentage points with 95%…

A: Given that the margin of error is 4 percentage points. That is, ME=4%=0.04 Confidence level =95% The…

Q: The confidence interval was (41%, 45%) What was the margin of error? +/- % What was the summary…

Q: Use the confidence interval to find the margin area (.596,.740) margin of error? samplemean?

A: Given confidence interval is (.596,.740) margin of error=? sample mean=?

Q: 405 (Round to three decimal places as needed.) b) Identify the value of the margin of error E. E=D…

Q: How do I calculate a 95% confidence level for a sample proportion in excel? Meaning, what formula…

A: Given : Confidence level = CL = 95% = 0.95

Q: tc for a 0.99 confidence level when the sample is 9. (Round your answer to three decimal places.)

Q: 14. Direct Mail A survey shows that 51% of adults prefer to receive advertisements through the mail.…

A: Given percent of adults prefer to receive advertisements through the mail=51%Margin of error(E)=5.2%

Q: The confidence interval was (57, 61) What was the point estimate? What was the margin of error?…

A: we have to find asked values from given data

Q: A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll,…

A: p^=Xn X=593,n=1025 Zcritical=Zα/2=1.65 at α=0.10(1-α)% CI for p…

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

A: Given e=Margin of error=8%, level of significance ɑ=0.10

Q: Use the sample data and confidence level given below to complete parts (b) A research institute…

A: Margin of error can be calculated as shown below.

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A research…

A: Solution: a. From the given information, n=2419 and X=1183.

Q: A Gallup poll recently asked 6007 randomly selected American adults by telephone the question: "Are…

A: We are authorised to answer three subparts at a time since you have not mentioned which part you…

Q: In a survey of 323 adults over 50, 60% said they were taking vitamin supplements. Find the margin of…

Q: Find the population proportion? find the margin of e? construct confidence interval ?

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A research…

Q: There is a popular lottery in which a ticket is called a scratcher. You are an auditor and want to…

Q: Find a 95% confidence interval for the difference between full attendance students' Exam 5 score and…

A: We have given data, Less attendance Full attendance 90 96 90 96 60 100 50 99 69 88…

Q: A newspaper provided a "snapshot" illustrating poll results from 1910 professionals who interview…

A: We have given that point estimate = 0.26Margin of error = ±3% 0.03 Sample size (n) = 1910

Q: A newspaper reported the results of a political poll about which candidate likely voters preferred,…

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

Q: Use the sample data and confidence level given below to complete parts (a) through (c). A research…

Q: A research institute poll asked respondents if they acted to annoy a bad driver. In the poll, n=2320…

A: The random variable percentage of people who said they honked follows binomial distribution. The…

Q: Explain how to find the 95% confidence interval for the mean by hand using the following data set…

A: For the given sample, x¯=59.05, from the excel function, =AVERAGE(J2:J21)s=4.6394, from the excel…

Q: A research survey is commissioned to estimate the proportion of UK people who have traveled to…

A: Obtain the large sample size at 95% confidence level. The large sample size is obtained below as…

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

A: Obtain the sample size of a no preliminary estimate for p. The formula of sample size is, Here,…

Q: What is the margin of error för a sample of 34 students whose average height. with 90% confidence,…

A: Given Information: Given is 90% confidence interval for average height calculated using sample size…

Q: What are the z-scores for 90%, 95%, and 99% confidence?

A: the z-scores for 90%, 95%, and 99% confidence

Q: What is the multiplier for an interval that estimates the proportion with a. 88% confidence? b.…

A: Confidence Interval: The form of the confidence interval is, CI = Point estimate ± Margin of error…

Q: A survey was conducted that asked 1019 people how many books they had read in the past year. Results…

A: X-bar=10.3 S=16.6 Sample size=1019 We need to construct 90% confidence interval

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A research…

A: Given; x=561n=935The level of significance is;α=1-0.95=0.05 (a) The best point estimate of the…

Concept explainers

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.

Topic Video

Question

(a) an 85% level of confidence
sample proportion _
margin of error ± _ %

(b) a 98% level of confidence
sample proportion _
margin of error ± _ %

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 5 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

$Hypothesis Tests and Confidence Intervals for Proportions$

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, probability and related others by exploring similar questions and additional content below.

Similar questions

Hi, please help me solve for question B. Thank you!
A magazine provided results from a poll of 500 adults who were asked to identify their favorite pie Among the 500 respondents, 13% chose chocolate pie, and the margin of error was given as +4 percentage points. What values do p, q, n, E, and p represent? If the confidence level is 95%, what is the value of a? The value of p is The value of q is The value of n is The value of E is The value of p is If the confidence level is 95%, what is the value of a? (Type an integer or a decimal. Do not round.)
just the multiple choice part thank you!
Estimate of the proportion p for a 95% confidence with a sample size ? = 400 and point estimate ?̂= 0.4 Please provide it neatly with indicated given, formula, solution, and answer.
A hospital administrator wants to estimate the proportion of patients whose hospital stay exceeds a week. How many patients should be sampled to estimate the proportion staying more than a week to within 4 percentage points with 90% confidence?
Use the sample data and confidence level given below to complete parts ( a ) through ( d ) . A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n= 1003 and x= 574 who said "yes." Use a 99 % confidence level. A. Find the best point estimate of the population proportion. ( Round to three decimal places as needed. ) B. Identify the value of the margin of error E. (Round to three decimal places as needed) C. Construct a confidence interval.(Round to three decimal places as needed)
1. A new brand of chocolate bar is being market tested. Four hundred of the new chocolate bars were given to consumers to try. The consumers were asked whether they liked or disliked the chocolate bar. You are given their responses below. A Response Frequency Liked 360 Disliked 40 Total 400
Use the sample data and confidence level given below to complete parts (a) through (d). A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n=972 and x = 577 who said "yes." Use a 99% confidence level. Click the icon to view a table of z scores. 0.594 (Round to three decimal places as needed.) b) Identify the value of the margin of error E. E = 0.041 (Round to three decimal places as needed.) c) Construct the confidence interval.
How do you find a 99 percent confidence interval?