Suppose that the researchers wanted to estimate the proportion of patients under 50 years old who experience a failure within the first 2 years after receiving this type of defibrillator to within 0.03 with 95% confidence. How large a sample should be used? Use the results of the study as a preliminary estimate of the population proportion. (Round your answer up to the nearest whole number.) patients

Q: A survey of women who are the main meal preparers in their households reported that 80% know that…

A: From the provided information, A survey of women who are the main meal preparers in their households…

Q: A researcher wishes to estimate the proportion of adults who have high - speed Internet access .…

A:

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: Margin of Error(E)=0.05For 99% confidence level Zα2=2.576 Formula; E=Zα2×(p×(1-p)n)

Q: Suppose that you wish to find a population proportion p with accuracy ±2% with 99% confidence. What…

A:

Q: We wish to know the 95% confidence interval for the population proportion of people who believe that…

A:

Q: In a survey, the planning value for the population proportion is .25. How large a sample should be…

A: Solution: It is given that the planning value for the population proportion is 0.25. The confidence…

Q: Based on past data, it is known that about 20.5% of people smoke cigarettes. Suppose we take a…

A: Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: It is given that margin of error (E) is 0.04 and the confidence level is 99%.Here,

Q: A researcher wishes to estimate the  proportion of adults who have high speed internet access. what…

A: Given Information: Error (e) = 0.02 Confidence level = 90%  The z score at 90% confidence level is…

Q: The sample is actually 55.  what is the critical value?

A: It is given that the sample is 55 and there are three treatments.

Q: A federal report indicated that 17% of children under age 6 live in poverty in Nevada, an increase…

A: Given data, p=17%=0.17 E=2%=0.02 z-value at 99% confidence is Zc=2.576 n=?

Q: How many people must be surveyed if we want to estimate the percentage of students weigh more than…

A: Given: The margin of error = 3%=0.03 Confidence level = 98% Since the proportion is students is not…

Q: A random sample of medical files is used to estimate the proportion p of all people who have blood…

A: Margin of error(E), E=z×p×qn From the above E, find n, n=zE2×p×q Here, E=0.04 There is no…

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: a) Given,   Margin error = 0.02 Population proportion = 0.36   The objective is to find the sample…

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: GivenMargin of error(E)=0.03confidence level(c)=99%α=1-0.99=0.01α2=0.05zα2=z0.05=1.6449   (from…

Q: A federal report indicated that 22% of children under age 6 live in poverty in South Dakota, an…

A: Given,sample proportion(p^)=0.22margin of error(E)=0.04α=1-0.90=0.1α2=0.05z0.05=1.645

Q: If you want to be 95​% confident of estimating the population proportion to within a sampling error…

A: z-critical value at alpha(0.95) = 1.96 margin of error =0.08   p = 0.5

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny . What…

A: A) Sample size obtained when he uses a previous estimate of 32%. As given he wishes the estimate to…

Q: In 2018, the General Social Survey asked a random sample of 1,414 adults "Have you ever been told…

A: a. A random sample of 1,414 adults are taken for a survey to ask question 'Have you ever been told…

Q: . A survey of folk music fans yields this 95% confidence interval estimate of the proportion of fans…

A: The 95% confidence interval for proportion of fans who love music of David Wilcox is 0.74 to 0.86

Q: A consumer agency wants to estimate the proportion of all drivers who wear seat belts while driving.…

A: Given information- Confidence interval = 0.99 Significance level (α) = 1- 0.99 = 0.01 Error (E) =…

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: If you want to be 95% confident of estimating the population proportion to within sampling error of…

A:

Q: If you want to be 95​% confident of estimating the population proportion to within a sampling error…

A:

Q: We want to estimate, with a maximum error of .02, the true proportion of all senior medical students…

A: compute sample size ( n ) = n=(Z/E)^2*p*(1-p)

Q: A doctor wants to estimate the mean HDL cholesterol of all​ 20- to​ 29-year-old females. How many…

A: Given: Margin of error (E) = 2 Confidence level = 0.99 Therefore, α=1-0.99=0.01 Standard deviation…

Q: A survey of folk music fans yields this 95% confidence interval estimate of the proportion of fans…

A: Solution: From the given information, the 95% confidence interval of the proportion of fans who love…

Q: wishes the estimate to be within 0.04 with 95% confidence if (a) she uses a previous estimate of…

A: We have to find what size sample should be obtained if she wishes the estimate to be within 0.04…

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: d. Construct a 95% confidence interval estimate. How does this change your answer to part (b)?

A: Given that Sample size n = 50 Sample mean = 0.987 Population SD = 0.02 The critical value of Z at…

Q: It has been claimed that over 30 percent of entering college students have blood cholesterol levels…

A: The appropriate test for the given claim is one sample t test over the hypothesis, H0 : μ≥200 Ha ;…

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

A:

Q: Your state is considering raising the legal age for consumption of alcohol beverages. How large a…

A: From the provided information, Margin of error (E) = 0.01 Confidence level = 99%

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: A federal report indicated that 28% of children under age 6 live in poverty in Kentucky, an increase…

A: Given: The proportion of children under age 6 who live in poverty in Kentucky is p^=0.28. The margin…

Q: If you want to be 95% confident of estimating the population proportion to within a sampling error…

A: Obtain the sample size of a preliminary estimate for p with 0.40. The formula of sample size is,…

Q: (a) Starting with the 75% estimate for Italians, how large a sample must you collect in order to…

A: The method of Sample Size and margin of error will be used: In a confidence interval, the range,…

Q: How large a sample size is needed to estimate the incidence of female breast cancer in population…

A: Obtain the sample size of a preliminary estimate for p is 0.03 with the 95% confidence. The formula…

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: what sample size should a researcher take if he wants to estimate a population proportion to be 2%…

A: From the given information,   Margin error = 0.02 Assume sample proportion = 0.5   Critical value:…

Q: What percent of our campus is female? If no preliminary study is made to estimate, how large a…

A:

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

A:

Q: What sample size is needed to give a margin of error within ±3%±3% in estimating a population…

A: We have given that,  Population proportion (p) = 0.4, margin of error (E) = ±3% = 0.03 and…

Q: Which store do you think is more expensive—physical or online? A recent survey found that 45% of…

A:

Q: A sample size of _is needed.?

A: Here use formula of margin of error

Q: At 90% confidence, how large a sample should be taken to obtain a margin of error of 0.047 for the…

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

Q: If a 95% Confidence for the Population Proportion is (0.56, 0.78), fınd its Margin of Error.

A:

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: a) Given that: p= previous estimate = 32% =0.32 e= error= 3%=0.03 z=critical value for confidence…

Q: Set up the null and alternate hypotheses to test whether the population mean is equal to 10 when you…

A: The Null hypothesis is  Ho: μ=10