The American Heart Association is about to conduct an anti-smoking campaign and wants to know the fraction of Americans over 28 who smoke. In an earlier study, the population proportion was estimated to be 0.20   How large a sample would be required in order to estimate the fraction of Americans over 28who smoke at the 90% confidence level with an error of at most 0.020? Round your answer up to the next integer.

Q: Kim wants to determine a 99 percent confidence interval for the true proportion of high school…

A: From the given information, Margin error (E) = 0.03 Assume sample proportion = 0.5   The objective…

Q: A polling agency reported that 66 percent of adults living in the United States were satisfied with…

A: The 100 (1 – α)% confidence interval provides an interval estimation of the required population…

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

A:

Q: a. How many of the 3039 subjects used at least one prescription medication? (Round to the nearest…

A: Given : Total sample size of the survey  = 3039 Out of the sample, proportion of people who have…

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

A:

Q: A research group wants to estimate the proportion of consumers who plan to buy a scanner for their…

A: It is given that margin of error (E) is 0.04 and the confidence level is 0.90.

Q: Dylan wants to determine a 95% confidence interval for the true proportion of high school students…

A:

Q: Based on a survey of a random sample of 900 adults in the United States, a journalist reportS that…

A:

Q: Here are summary statistics for randomly selected weights of newborn​ girls: n=245, x (overbar)…

A: IntroductionThe 100 (1 – α) % confidence interval for the population mean, μ, for given sample…

Q: In a sample of size 10, the number of defective parts is 1. If p is the population proportion of…

A:

Q: Construct the 94% confidence interval estimate of the population proportion ? if the sample size is…

A:

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

A: Population proportion estimate p^=0.28 Confidence level = 99% Error = at most 0.03

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

A: The following information has been provided: p^=0.51E=0.03 The level of significance is : α=1-0.94…

Q: Suppose that you intend to find a 95% confidence interval for a population mean by applying the…

A: The z value at 95% confidence level from the standard normal table is 1.96.Let σ is the population…

Q: In a​ poll, 69​% of the people polled answered yes to the question​ "Are you in favor of the death…

A: From the given question,69% of the people polled answered yes to the question.That means,…

Q: You are interested in constructing a 95% confidence interval for the proportion of all caterpillars…

A:

Q: The American Heart Association is about to conduct an anti-smoking campaign and wants to know the…

A: It is given that margin of error (E) is 0.02 and the confidence level is 0.80.

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: The American Heart Association is about to conduct an anti-smoking campaign and wants to know the…

A: From the provided information, Population proportion (p) = 0.2 Confidence level = 99% The z value at…

Q: In order to make the decision for one business, your team constructed a 90% confidence interval, the…

A: For 90% confidence interval, the width of that confidence interval is 500.We have to reduce the…

Q: Wants to determine a 80 percent confidence interval for the true proportion p of school students in…

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

Q: A simple random sample of 120 vet clinics in the Midwest reveals that the vast majority of clinics…

A: Given that  Sample size n =120 Favorable cases x =88 Sample proportion p^=x/n  =88/120 =0.7333

Q: Dylan wants to determine a 99 percent confidence interval for the true proportion pp of high school…

A:

Q: The statistics department is interested in estimating the proportion of students who have majored in…

A: Here we need to find the required sample size to estimate the proportion of students who majored…

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

A: GivenMargin of error(E)=0.04cofidence level(c)=80%assume population proportion (p)…

Q: What is the critical z value for a confidence level of 99% (to 3 decimal places) for the difference…

A: We have given that  Favourable cases, X1 = 98 Favourable cases, X2 = 80 Sample size, n1 = 140 Sample…

Q: The American Heart Association is about to conduct an anti-smoking campaign and wants to know the…

A: Obtain the sample size. The formula of sample size is, Use EXCEL Procedure for finding the critical…

Q: In a previous study, it was found that p̂= .73 for a particular sample. Suppose we would like to…

A: Given information Error = 0.01 Confidence level = 0.98

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

A:

Q: A study was conducted to determine if the percent of women who received financial aid is different…

A: a. 90% confidence interval for the differences in financial aid rates between men and women is-…

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

A:

Q: In the previous example, you learned that the 95% confidence interval for the true proportion of all…

A: Calculate the point estimate and margin of error used to create this confidence interval.

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: 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: Nearly one half of americans aged 25 to 29 are unmarried.  How large a sample is necessary to…

A: The formula for the sample size is as follows:

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

A: Given, p=0.51 M.E=0.02 α=1-0.94=0.06 As per z-distribution table, the critical value of z at 0.06…

Q: A magazine provided results from a poll of 500 adults who were asked to identify their favorite pie.…

A: Solution: Given information: n= 500 Sample size Here we need to interpret the meaning of each…

Q: In a survey, the planning value for the population proportion is p* = 0.25. How large a sample…

A: Given : Population proportion (p*) = 0.25 Confidence level = 95% So ; significance level (α) =…

Q: In a survey, the planning value for the population proportion is p* = 0.25. How large a sample…

A: Given,sample proportion(p*)=0.25margin of error(E)=0.08α=1-0.95=0.05α2=0.025Z0.025=1.96   (from…

Q: The American Heart Association is about to conduct an anti-smoking campaign and wants to know the…

A:

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: Given data, p=0.19 E=0.03 z-value at 80% confidence is Zc=1.282 n=?

Q: A researcher is trying to estimate the population mean (μ) of anxiety based on his sample of n = 16…

A: Given that, Sample mean, M = 58 Sample standard deviation, s = 5.36 Sample size, n = 16

Q: In a survey, the planning value for the population proportion is p* = 0.35. How large a sample…

A: Find z-critical value. Refer Standard normal table/Z-table OR use excel function…

Q: You read about a survey in a newspaper and find that 70% of the 250 people sampled prefer Candidate…

A:

Q: A sample of 100 components is drawn, and a 95% confidence interval for the proportion defective…

A:

Q: In a​ poll, 37​% of the people polled answered yes to the question​ "Are you in favor of the death…

A: Given information- Margin of error, E = 5% = 0.05 Confidence level, c = 96% We have given that 37​%…

Q: 17. Cora wants to determine a 80 percent confidence interval for the true proportion p of high…

A:

Q: A random sample of 340 college students were asked if they believed that places could be haunted,…

A:

Q: In a​ poll, 69​% of the people polled answered yes to the question​ "Are you in favor of the death…

A: Given: Margin of errorE=0.02 Proportion of people who polled yes p^=0.69 The z value corresponding…

Q: Bob makes a 95% confidence interval with a random sample of 100 and his margin of error is plus or…

A: Here we need to choose from the correct option.

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.