Previous > Next QUESTION 23 You have been assigned to determine whether more people prefer Coke to Pepsi. Assume that roughly half the population prefers Coke and half prefers Pepsi. How large a sample would you need to take to ensure that you could estimate, with 95% confidence, the proportion of people preferring Coke within 3% of the actual value? A) 1068 B) 533 C) 1503 D) 751

Q: A report statesb that 45% of home owners had a vegetable garden, how large a sample is needed to…

A: Answer: From the given data, population proportion (P) =45% = 0.45 Margin of error (ME) = 6% = 0.06…

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: p∗=43%p∗=43%. You would like to be 95% confident that your esimate is within 2.5% of the true…

A: Given, p=430%=0.43 Confidence interval= 95%=0.95 Margin of error (E)= 2.5% =0.025

Q: . The estimate of the population proportion is to be within plus or minus 0.10, with a 95% level of…

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Q: or the population of 31 companies surveyed, with an average size of 1,414 workers? What type of…

A: Given  Average size = 1414 Companies = 31 The total population will be = 31*1414 =43834

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

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

A: Given :Margin of error:ME = 0.06sample proportion:p̂ = 0.23

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

A: Introduction: The confidence interval for the population proportion, p at the 100 (1 – α) %…

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

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

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Q: According to statistics reported on CNBC, a surprising number of motor vehicles are not covered by…

A: sample size(n)=218No. vehicles were not covered by insurance(x)=33

Q: When estimating the population proportion, how large a sample is needed to be 95% confident that the…

A: Given:  The margin of error is equal to 0.05  Confidence Level : 95%  It is asked to compute the…

Q: You want to obtain a sample to estimate a percentage of Statistics students at ACM that get a grade…

A: As per our honor code, we will provide the answer for first three parts only. Given information:…

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

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

A:

Q: 2. Let sample proportion . How large a sample should be taken to be 95 % sure that the error of…

A: As per our guidelines we are supposed to answer only one question per post. Given that, margin of…

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

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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: 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: if the 90% Ci for the population mean is (-2. 58, 7.54) what is the sample mean О a.248 ОБ. 10.12 O…

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

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

A: Obtain the sample size of a preliminary estimate for p is 0.90.   The formula of sample size is,…

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 0.03 and the confidence level is 95%.

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

A: Given P=24%= 0.24 than q= 1-p =0.76 Confidence =99.9 % Estimate = 5%= 0.05  We have to calculate n

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

A: Sample Size: The formula for the sample size is as follows: Here, zα/2 is the critical value at 98%…

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

A: The provided information are: Population proportion (p) = 40% = 0.40 Margin of error (E) = 1.5% =…

Q: 10. Mercury In below are the amounts of mercury (in parts per million, or ppm) found in tuna sushi…

A: Sample mean x¯=0.719 ppm Standard Deviations=0.366 ppm Confidence level:90% Sample Size n=7

Q: 1. What are the null and alternative hypotheses? Ho: p= 0.5000 Ha: p>0.5000 2. Calculate the null…

A: Given: No. of crashes occur, x=107 Sample size, n=195

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

A: Obtain the sample size of a preliminary estimate for p with 0.11. The formula of sample size is,…

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

A: Step-by-step procedure to obtain the value of z using MINITAB:Choose Graph > Probability…

Q: 8 is incorrect. How many people are considered morbidly obese is blank?

A: (a) Morbidly obese countA dot plot is a type of visualization that works by using dots to explicitly…

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

A: Givenpopulation proportion(p)=0.74Margin of error(E)=0.05confidnence interval…

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: Use these results from a USA Today survey in which 510 people choseto respond to this question that…

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Q: c. The test-statistic for this data = (Please show your answer to three decimal places.) d. The…

A: Using R

Q: A poll taken this year asked 1015 adults whether they were fans of a particular sport and 62% said…

A: sample size (n)=1015  Proportion of this year (p) =0.62 Confidence level = 0.95α = 1- confidence…

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

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

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

A: The population proportion is 76%; p=0.76 Margin of error is 2.5%; Margin of error=0.025…

Q: Determine the point estimate. A survey of 400 non-fatal accidents showed that 152 involved the use…

A: Given that :  Sample size (n) = 400 X = 152  Point estimate ( p cap) = x / n By using this formula…

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

A: The calculation for the size of the population can be done using the finite population or infinite…

Q: It is claimed that the weight of canned cans produced by the firm should be 650 g, but this is not…

A: From the given information, Null Hypothesis: H0: The mean weight of the firm is equal to 650 g.…