You are working on a political campaign and you want to take a sample to determine your candidate’s present status. It is a very close race between your candidate and the opponent. How many samples must be taken to ensure that the measured percentage of voters supporting your candidate will lie within a margin of error of 3% with 95% confidence? How many samples will be needed to satisfy these requirements? Show the formula employed along with any explanations and assumptions.

Q: Your professor wishes to estimate the proportion of high school students enrolled in college-level…

A: Given: margin of error of 3.5 percent 99% confidenp p= 18.3%

Q: given as + Choose th

A: The margin of error is the amount of random sampling error in the results of a survey. The larger…

Q: A stats class was interested in determining the percentage of students on their campus who are…

A: Given Information: Sample size n=95 proportion p1=0.35 Margin of error E=0.098 Second case: Sample…

Q: You are testing the claim that the proportion of men who own cats is smaller than the proportion of…

A: we have given that  sample 1 = N1=50  and sample proportion 1 =p1^=20%=0.2 sample 2 = N2=110  and…

Q: You are running a political campaign and wish to estimate, with 95% confidence, the proportion of…

A: Formula for the sample size needed to estimate a population proportion is

Q: In Africa in 2011, the number of deaths of a female from cardiovascular disease for different age…

A: The data shows the number of deaths of a female from cardiovascular disease for different age…

Q: Let's say we collect a sample of 500 individuals from a community in Reno and find that 20 of them…

A: Test statistic formula for testing one sample proportion is, z=p^-pp1-pn  =p^-pSEp In the given…

Q: If you are analyzing statistical data from a range of percentages of participant responses and…

A: If you are analyzing statistical data from a range of percentages of participant responses and…

Q: Describe a business scenario where you would have to test more than two samples of data. What type…

A: Given information: The investigator is specially interested describe a scenario to test more than…

Q: A survey company polls 1,233 voters about whether they plan to vote for the Liberal or the…

A: Sample size 52% of voters prefer the Liberal candidate i.e., Significance level

Q: What is the difference between a one way anova, a repeated measures anova, and 2 way anova? Are the…

A: ANOVA test is used to analyze the difference between means of more than two groups. One way ANOVA…

Q: Phineas Phillips, from Philadelphia, has a fascination with fun phone facts. But Phineas has…

A:

Q: A rare birth defect occurs in approximately 0.5% of all cases in males. If we sample all the males…

A: Given information: The total number of males born in 2016 in a specific region is N = 200,000. It is…

Q: The brand manager for a brand of toothpaste must plan a campaign designed to increase brand…

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 consumer agency wants to determine whether there is a major difference between the proportions of…

A: Introduction: Denote p1, p2 as the true population proportions of cars of model and model 2,…

Q: Depression is a serious mental disorder that has been shown to respond very well to cognitive…

A: Introduction: An independent variable in a study is a variable that has the potential to affect and…

Q: Suppose a certain virus (sorry!) affects 0.3% of the population. A test used to detect the virus is…

A: 0.3% of 100000 population have virus.  0.3*100000/100= 300  people have virus.  88% have virus and…

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

A: given data   CI = 0.90, P ( - Z< P < Z ) = 0.90 therefore z = 1.645 ( =z table ) E = 6% =…

Q: A statistician wants to determine if there is a difference in the fuel efficiency of cars between…

A: Given info: The claim of the test is there is a difference in the fuel efficiency of cars between…

Q: The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that…

A: Let p denotes the population proportion of driver fatalities related to alcohol. The test is that…

Q: The local school is conducting another survey to determine the proportion of students at the school…

A: Confidence interval is defined as the range that contains the value of the true population…

Q: The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that…

A:

Q: Maci is a social networking maniac! Although she prefers Instagram, she also spends a lot of time…

A: Introduction A variable is a no., characteristic which can be counted or measured.

Q: Depression is a serious mental disorder that has been shown to respond very well to cognitive…

A: The following are the scores for the sample: 4, 3, 6, 2, 4, 6, 7, 5, 2, 1, 8, 9, 7, 4, and 10 The…

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: You would like to estimate the proportion of all residents in favor of a new law with 98%…

A: The sample proportion is 0.30, margin of error is 0.06, and the confidence level is 98%. Computation…

Q: Gap, Express, Zara, and America Online are just a few of the many companies interested in knowing…

A:

Q: In a National Institute on Alcohol Abuse and Alcoholism survey, 33% of American adults said that…

A: Given: n= 2300 ,x= 805 p= 0.33 ,significance level(∝)= 95.0 p̂= 805 / 2300 =define hypothesis;-

Q: A wildlife biologist is doing research on chronic wasting disease and its impact on the deer…

A:

Q: Professor X wants to compare a new approach to his teaching style.  24 students are matched…

A: Introduction: It is given that 24 students are paired based on their prior background and academic…

Q: A study showed that 62% of supermarket shoppers believe supermarket brands to be as good as national…

A: claim is that the percentage of supermarket shoppers who believe that the supermarket ketchup was as…

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

A: It is given that margin of error (E) is 0.04 and the confidence level is 0.95.

Q: The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that…

A: State the hypotheses. That is, there is no evidence that population proportion of driver fatalities…

Q: Researchers conducted a study to determine whether there were significant differences in graduation…

A: Given that, probability, p= 96% = 0.96 So q= 1-p= 1-0.96= 0.04 And sample size is n= 13 So X~…

Q: A health organization wants to estimate the population proportion of Ohioans who have received the…

A: From the provided information, Margin of error (E) = 0.04 Confidence level = 99%

Q: After an introductory statistics course, 60% of students can successfully construct box plots. Of…

A: Given Information: 60% of students can successfully construct box plots Of those who can construct…

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.