A researcher wants to estimate the prevalence of breast cancer among women who are between 35 and 45 years of age living in Western Visayas. How many women must be involved in the study to ensure that the estimate is precise? If national data suggest that 1 in 235 women are diagnosed with breast cancer by age 40, this translates to a proportion of 0.0043 (0.43%) or prevalence of 43 per 10,000 women. Suppose the researcher wants the estimate to be within 10 per 10,000 women with 95% confidence. What would be the sample size? Show your solution including the formula you used.

Q: A university dean is interested in determining the proportion of students who recieve some sor of…

A:

Q: The use of the Internet is constantly growing. How many randomly selected adults must be surveyed to…

A: Solution

Q: Suppose a researcher wants to estimate the population proportion of defective light bulbs. He took a…

A:

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: Given data, P1 = 21.9% = 0.219 P2 = 14.4% = 0.144 E = 2% = 0.02 Z= value at 95% confidence is Zc =…

Q: In a survey of 399 randomly selected households conducted in the U.S., it was found that 158 of the…

A: Given, The objective is to find the best point estimate of the proportion of households that have…

Q: In a study to estimate the proportion of smokers among the residents in a certain city and its…

A: To testH0:p1=p2H1:p1≠p2

Q: A survey of 2310 adults in a certain large country aged 18 and older conducted by a reputable…

A: Given information- We have given that in a survey of 2310 adults in a certain large country aged 18…

Q: quality conscious disc manufacturer wishes to know the fraction of disks his company makes which are…

A: Given Sample size =865 X=112

Q: Because of the increased cost of housing, a national real estate board wants to compare the…

A:

Q: In an October 2003 poll conducted by the Gallup organization, 684 of 1006 randomly selected adults…

A: Point estimate:The point estimate of population proportion is sample proportion.

Q: A survey of 2390 musicians showed that 398 of them are left-handed. Find a point estimate for p, the…

A: We have find population left handed..

Q: A manufacturer of golf equipment wishes to estimate the number of left-handed golfers. How large a…

A: Given,          Sample proportion  P∧=0.09          Margin of Error∈=0.04          and…

Q: A researcher wishes to estimate the number of households with two cars. How large a sample is needed…

A:

Q: ate the proportion of households with two cars. How large a sample is needed in order to be 95%…

A: Following information is given: Confidence level = 95% Prior estimate of population proportion = 40%…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: Given Margin of error=0.04 (a) she uses the estimates of 21.8​% male and 18.1​% female from a…

Q: A researcher wants to calculate the prevalence of Alzheimer’s among members of a specific community…

A: Solution: Given information: Margin of error = E= 0.01 Population proportion = p = 0.1073 Confidence…

Q: What proportion of the sample reported that they had been cyberbullied?

A: Givensample size(n)=14795No.of respondents say yes they had been cyberbullied(x1) = 2219No.of…

Q: Suppose the U.S. president wants to estimate the proportion of the population that supports his…

A: Critical value: The value of α is 0.05 for 95% confidence level. Using excel formula…

Q: A Plitical pollster wants to know what proportion of voters think james burger should go away and…

A:

Q: A coworker says she needs to test 5000 subjects in order to have enough power to detect a…

A: Here for the above question, effect size is related with a sample size. As we know a test is…

Q: Is the percentage of people who pay for Netlix accounts less than 75%? a. State your hypotheses. b.…

A: Note: Hi there! Thank you for posting the question. As your question has more than 3 parts, we have…

Q: From a sample of 500 items, 30 were found to be defective. The point estimate of the population…

A: The point estimate of the population proportion is the sample proportion. The formula for point…

Q: A pollster wishes to estimate the number of left-handed scientists. How large a sample is needed in…

A:

Q: The death rate per 100,000 for lung cancer is 7 among non-smokers and 71 among smokers. The death…

A: Given Information: The death rate per 100,000 for lung cancer is 7 among non-smokers and 71 among…

Q: a pollster wishes to estimate the number of left-handed scientists. How large a sample is needed in…

A: Given P=0.09 E=0.06 Z(0.01)=2.33

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: The formula for margin of error is given as follows: E=zα/2p11-p1n+p21-p2n

Q: What is the point estimate of the true proportion of people in the population who are over 6 feet…

A: Given that, Sample of 50 peoples is to be drawn and out of which 14 are possessing  characteristic…

Q: Suppose a study revealed 46% of all subjects possessed trait A, 16% possessed both trait A and trait…

A: Solution

Q: A political campaign manager wishes to survey a number of voters to estimate the proportion of those…

A:

Q: The highway department wants to estimate the proportion of vehicles on a Toll road at KM 25 between…

A: Sample proportion is given by    p = x/n Here x is the number of 18 wheelers vehicles And n is the…

Q: A study is to be made to estimate the proportion of residents of a certain city and its suburbs who…

A: Given: Margin of Error ME= 0.06 Confidence level c= 0.90

Q: A university dean is interested in determining the proportion of students who receive some sort of…

A:

Q: A study is to be made to estimate the proportion of residents of a certain city and its suburbs who…

A: Given: Confidence level = 0.95, margin of error = E = 0.08.

Q: A survey of 120 fatal accidents showed that in 24 cases the driver at fault was inadequately…

A: Point estimate:   The population parameter which is estimated by using sample statistic is termed as…

Q: If the population proportion is 0.7 . A researcher wants the margin of error to be 0.20 and the…

A: Given  pcap=0.7, Zcritical=1.96 at alpha=0.05 MOE=0.20

Q: A poll found that 83% of people out of a survey of size 127 watch at least three hours of TV per…

A: Given: A poll found that 83% of people out of a survey of size 127 watch at least three hours of TV…

Q: A pollster wishes to estimate the number of left-handed scientists. How large a sample is needed in…

A: From the provided information, Study indicates that proportion of left-handed scientists is 9% that…

Q: A survey of 2322 adults in a certain large country aged 18 and older conducted by a reputable…

A: Solution: Let X be the number of adults in the country aged 18 and older who have donated blood in…

Q: A researcher wants to estimate the impact prenatal care during pregnancy can have on anemia rates in…

A:

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

A: From the provided information, Confidence level = 99% Margin of error (E) = ±0.05 Proportion (p) =…

Q: 2. Find the minimum sample size needed to be 90% confident that the true proportion of students who…

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

Q: A study is to be made to estimate the proportion of residents of a certain city and its suburbs who…

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

Q: Because of the increased cost of housing, a national real estate board wants to compare the…

A: (a): Null hypothesis H0: proportion of rural areas = proportion of metropolitan areas H1: proportion…

Q: A researcher wants to determine the percentage of American teenagers who send or receive text…

A:

Q: A poll found that 71% of people out of a survey of size 130 watch at least three hours of TV per…

A: From the given information,   A poll found that 71% of people out of a survey of size 130 watch at…

Q: A university dean is interested in determining the proportion of students who receive some sort of…

A: Given: Confidence level=95%Margin of error E=2% From the Standard Normal Table, the value of z* for…

Q: A pollster wishes to estimate the proportion of United States voters who favor capital punishment.…

A: Given that, Critical value: Using the z-table, the critical value at 90% confidence level is

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: Given Error, E=±0.05CL=0.99

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.