A marketing analyst wants to predict the proportion of mortages in the Oxford area that are distressed, meaning that borrowers are more than 3 months behind on payments. The analyst wants an estimate with a 95% level of confidence and an error of at most 6%?   Step 1 of 2 :   Assuming the analyst has no prior knowledge about the proportion, how large of a sample would be required for the analyst to make the desired estimate? Round your answer up to the next integer.

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Given,population proportion(p)=0.1margin of error (E)=0.025α=1-0.95=0.05α2=0.025Z0.025=1.96

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: The confidence level is 95% Therefore, α = 0.05 and α/2=0.025. The margin of error is 0.045 Since…

Q: this probiem, carry at least lour digits alteer the decimal in your calculadons. Answers may vary…

A: It is given that margin of error (E) is 0.03 and the confidence level is 0.80.

Q: A recent study indicated that 20% of 133 women over age 55 in the study were widows.  a. How large a…

A:

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A:

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

A:

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A:

Q: how large of a sample would be required for the commissioner to make the desired estimate?

A: The state education commission wants to estimate the proportion of tenth-grade students in the state…

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: Solution: a. From the given information, confidence level is 0.99 and E=0.08. Since the proportion…

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: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: a.   Formula for sample size is, Let us consider the population proportion is 0.5. Given that…

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

A:

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: From the given information,   Margin of error E= 0.01 Population proportion p= 0.33 Confidence level…

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

A: According to the provided information, Proportion is unknown. So, worse case proportion is 50%. p =…

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 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: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Find z-critical value: Refer Standard normal table/Z-table OR use excel function…

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: It is given that margin of error (E) is 0.02 and the confidence level is 0.90.

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: Given Information :  The National Council of Small Businesses is interested in the proportion of…

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: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: Given no primilinary sample is taken to estimate proportion of small businesses that declared…

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: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: The z critical value for a 80% confidence interval is calculated by using the excel formula…

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A:

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

A:

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: Given data How hard is it to reach a business person by phone? and given  let p be the proportion of…

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: The state education commission wants to estimate the proportion of tenth-grade students in the state…

A: Confidence level=99%Margin of error(E)=5%=0.05Assuming the commissioner has no prior knowledge about…

Q: What important feature is missing in the following scenario?

A: Given: The confidence interval for proportion is, (17.8% , 22.4%) The sample size = n = 1028

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

A: Given,Confidence level, C = 99% = 0.99Margin of error, E = 1.5% = 0.015

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

A:

Q: You want to obtain a sample to estimate the proportion of a population that possess a particular…

A: Given, p=68%=0.68, c=0.99 and E=1.5%=0.015.

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A:

Q: You want to obtain a sample to estimate the proportion of a population that possess a particular…

A: The confidence level is 98% and the margin of error is 5%.

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Given that, Critical value: Using the z-table, the critical value at 95% confidence level is ,