How large a sample size is needed to estimate the incidence of female breast cancer in population with 95% confidence and a margin of error that is no greater than 1% (0.01)? Assume that the expected incidence proportion in the population is 3% (0.03). How large a sample would be needed if you were willing to settle for 90% confidence? What was the effect of decreasing the required level of confidence

Q: You plan to take a random sample from a population of 500 items and build a 95% confidence interval…

A: We have given that Standard deviation(σ) = 100Margin of error (E) = 5Significance level (α) = 1 -…

Q: want to be 95% confident of esti you population proportion to within a sampling and there is…

A: Given that  Margin of error =E =0.05 Population proportion p=0.47

Q: At 95% confidence, how large a sample should be taken to obtain a margin of error of .03 for the…

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

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

A:

Q: Suppose that the researchers wanted to estimate the proportion of patients under 50 years old who…

A: Givenpatients under 50 yearsx=15n=81p^=1581=0.185Margin of error(E)=0.03confidence level(c)=95%

Q: AT scores are distributed with a mean of 1,500 and a standard devieation of 287. You are interested…

A: Given that, Critical value: Using the z-table, the critical value at 85% confidence level is ,

Q: 7. Create a confidence interval for o using the following information: Ages of people driving in the…

A:

Q: e margin of error will decrease because the critical value will decrease and the sample size, n. is…

A: Given that,The population standard deviation is unknown and the population distribution is…

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: Given Information: Confidence level = 80%  Error (e) = 0.05 Proportion (p) = 0.5 (assumed)  The z…

Q: Suppose for this random variable X we want to compute P(X ≤ 3)

A:

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

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

Q: A study quoted in The Windsor Star suggested that mathematics should be taught in the afternoon…

A: We have given that,  Confidence interval = 95 % and margin of error (B) = 0.06 Then,  We will find…

Q: "If the standard error of the estimate equals = 0, then r = ?" 1 -0.1

A: Hello. Since your question has multiple, we will solve first question for you. If you want remaining…

Q: For this problem, use the n=1/m2m2 formula. A political candidate has asked you to conduct a poll…

A: As there is no information about proportion, consider p = 0.5. Critical value: The value of α is…

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

A: Find z-critical value:…

Q: a researcher wants to estimate a population proportion with a margin of error of 0.05. What is the…

A: Given that the margin of error is 0.05. Given confidence level is 95% Significance level is 5% From…

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

A: From the provided information, Margin of error (E) = 0.04 Confidence level = 90%

Q: you want to obtain a sample to estimate a population mean. based on previous evidence, you believe…

A:

Q: At 95% confidence, how large a sample should be taken to obtain a margin of error of 0.08 for the…

A: From the given information, Margin error ( E ) = 0.08 Assume sample proportion = 0.5   The objective…

Q: Check My Work At 95% confidence, how large a sample should be taken to obtain a margin of error of…

A:

Q: In spite of the potential safety hazards, some people would like to have an internet connection in…

A: From the provided information, Proportion (p̂) = 0.20

Q: (c) Suppose that the researchers wanted to estimate the proportion of patients under 50 years old…

A: Givenx=19n=356Margin of error(E)=0.03p^=xn=19356=0.0534Confidence interval = 95%

Q: You want to estimate the percentage of small incorporated businesses that are owned by women. A…

A: The random variable percentage of small incorporated businesses follows binomial distribution. The…

Q: g that = 41.0 (in milligrams per 100 millileters-mg/100 ml). If the researcher wants to be 96%…

A: The population standard deviation  (σ)  = 41.0confidence level = 96%The margin of error (E) =4To…

Q: estimate the mean HDL cholesterol of all​ 20- to​ 29-year-old females. How many subjects are needed…

A: The sample size can be calculated as: n=z×σE2 Here, z = desired confidence level E = The allowable…

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: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: sample size n=?

Q: Based on historical data in Oxnard college, we believe that 40% of freshmen do not visit their…

A: Given Data: p=0.4   z-value for 95% Confidence Interval=1.96   ME=0.04

Q: A marketing analyst wants to predict the proportion of mortages in the Oxford area that are…

A: Margin of error(E)=6%=0.06Confidence level=95%

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

A:

Q: At 95% confidence, how large a sample should be taken to obtain a margin of error of 0.05 for the…

A: From the given information, Margin error ( E ) = 0.05 Assume sample proportion = 0.5   The objective…

Q: Statistics Canada wants to know the unemployment rate in Vancouver during any part of last year. How…

A: confidence level=90% Margin of error(E)=0.012

Q: An economist wants to know if the proportion of the U.S. population who commutes to work via…

A: The objective is to find the sample size required if an economist wants an estimate of the…

Q: Data from a representative sample were used to estimate that 33% of all computer users in a recent…

A: It is given that margin of error (E) is 0.04 and assumed that the confidence level is 95%.(No…

Q: You intend to estimate a population mean with a confidence interval. You believe the population to…

A:

Q: 4. How large a sample must be taken to estimate the proportion of households in which a cell phone…

A: In probability theory, a normal distribution is a type of continuous probability distribution for a…

Q: If you want to be 99% confident of estimating the population proportion to within a sampling error…

A: Answer:- Given, Confidence level, C = 99% = 0.99Error, E = 0.06Population proportion, p = 0.43 Using…

Q: 1. Given: n=130, a = 25, level of confidence is 90%. What is the margin of error of the given data?

A: The sample size is given as 130, n=130 The standard deviation is given as 25, σ=25 The Confidence…

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

A:

Q: You intend to estimate a population mean with a confidence interval. You believe the population to…

A:

Q: At 95% level of confidence the Z value is 2.575?

A:

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

A: The formula for the sample size is as follows: n=zα2×σE Here, zα/2 is the critical value at 99%…

Q: You intend to estimate a population mean with a confidence interval. You believe the population to…

A:

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.