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

A: Solution: From the given information, confidence level is 0.999 and E=0.05.

Q: 7:21 A ll 85% A news article that you read stated that 51% of voters prefer the Democratic…

A: a. It is observed that the test is one prop Z test. b. Hypotheses: Let p be the proportion of voters…

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: A DNP student wants to evaluate the change in knowledge scores of a group of cardiac patients after…

A: In given problem, a DNP student obtains a pretest at the beginning of class and immediately after…

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

A: State the hypotheses.   Let p1 denotes the population proportion of men who own cats. Let p2 denotes…

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: How large the sample size should be in order to be 98 percent confident, if the sample proportion is…

A: Given data, p=0.78 E=0.16 z-value at 98% confidence is Zc=2.326 n=?

Q: You wish to take a random sample of 45 students from a population of 120 men and 100  women for the…

A:

Q: A senator wishes to estimate the proportion of United States voters who favor abolishing the…

A: Given data  99% confidence interval for sample proportion.  E = 0.03 n = ?

Q: You take a random sample of size 25 students and find the 5 who understand this lecture. With 99%…

A:

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

A:

Q: A multinational firm hired a consultant to determine if the workers in their domestic plants were…

A: Given Information : A multinational firm hired a consultant to determine if the workers in their…

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: One of the tightest Senatorial races on Tuesday is in Maine. In a race that could prove pivotal for…

A: From the provided information, Sample size (n) = 1365 voters 696 responded that they are likely to…

Q: how does the sample and population relate?

A: Sample and population both are different items, but both are related with each other. Population is…

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: In a survey of 323 adults over 50, 60% said they were taking vitamin supplements. Find the margin of…

A:

Q: A researcher wants to estimate the percentage of adults in Georgia that have not graduated from high…

A: As we know Statistics represents sample and Parameter represents population.

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: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: Solution: From the given information, confidence level is 0.96 and E=0.02.

Q: Where could you get a representative sample of infants born in the state of Texas in 2001?     The…

A: From the given information we find the correct reperestiativ

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

A:

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

A: From the provided information, Confidence level = 98% Sample proportion (p̂) = 0.20 Margin of error…

Q: s the newly hired manager of a company that provides cell phone service, you want to determine the…

A: It is given that margin of error (E) is 0.92 and the confidence level is 0.90.

Q: Exit polling is a popular technique used to determine the outcome of an election prior to results…

A:

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: A researcher is running a study to determine the proportion of men that wear neckties to work. To…

A: Since, we answer only first three sub-parts of a question, we will answer the first three. Please re…

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

A:

Q: Give an example of the Trial and Error Method?

A:

Q: Dolling is a popular technique used to determine the outcome of an election prior to results being…

A: Given that  Population proportion p=0.51 Sample size n =400

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: Type O-negative blood type is called the universal donor type because it is compatible with any…

A: Given: Sample size is n =300. Sample number of individuals to have type O-negative blood type is x =…

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: belng tallied. Suppose a referendum to increase funding for education is on the ballot in a large…

A:

Q: If we construct a 95% confidence interval estimate for the true proportion of all Minnesota school…

A: here given, n = 200 sample proportion  =20200 = 0.1 here for z-critical use excel command…

Q: The probability that more than 159 people voted for the referendum is ___. (Round to four decimal…

A: From given data we have ; The sample size is n=300. The number of subjects is X=159. p^=159300=0.53

Q: You want to estimate the percentage of statistics students who get grades of C or better. How many…

A: Obtain the sample size. The formula of sample size is, Obtain the area of probability in the right…

Q: How many households must you survey if you want to be 94% confident that your sample percentage has…

A: Margin of error  = 0.03 Confidence level =  94%

Q: A drug company claims that an allergy medication causes headaches in 5% of those who take it. A…

A: Population: The set of all subjects of interest can be termed as population.

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.