Why is a sample proportion generally used to estimate a population proportion instead of obtaining the population proportion directly?

Q: The US States that rely on sales tax for revenue to fund education, public safety, and other…

A: The objective of the question is to identify what the value of $2350 represents in the context of…

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 popu time, you have no reasonable preliminary estimation…

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

A: Proportion is almost similar to the concept of probability. Proportion is a fraction of population…

Q: A sample of 50 potential customers was asked to use your new product and the product of the leading…

A: Let n = sample size = 50 X = number of customers who preferred the product in the sample = 30

Q: You need to test a claim that more than 18% of students at your campus do not know their blood…

A: Thanks for giving opportunity to serve for bartleby students, Hey, There ! Thank you for posting…

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: Given: Refer Standard normal table/Z-table OR use excel function "=NORM.S.INV(1-0.005)" to find…

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

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Q: Applying the law of large numbers, which sample mean would expect to be closer to the population…

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Q: What do I do when two proportion populations are the same?

A: The question is asking about the scenario when two population proportions are the same. In…

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: 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: Here is a sample data set. You may use StatCrunch or Excel to help you sort the data in order! 293…

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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: How can you make your sampling method more reliable? (English Translation: List a way you could make…

A: Introduction: Sampling is done in practical life instead of a population census, in most of the…

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

A: We have given that,  Population proportion (p) = 58% = 0.58, margin of error (E) = 4% = 0.04 and…

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: A quality-conscious disk manufacturer wishes to know the fraction of disks his company makes which…

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

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

A: Answer:-  Given, P=0.76 q=1-p=1-0.76=0.24 Confidence level=99% Critical Z value =2.5758 Margin of…

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

A: From the provided information, Population proportion (p) = 0.27 Margin of error (E) = 3.5% or 0.035…

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: Solution: From the given information, confidence level is 0.90, p=0.59 and E=0.03.

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: Find z-critical value:…

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

A: Given that Confidence level (C) = 95% We don't have any reasonable estimate for the population…

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

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Q: An educator desires to estimate, within 4%, the true percentage of high school students who study at…

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

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

A: population proportion (p) = 0.23 let, sample proportion = m and , number of samples to be collected…

Q: Please help answering this one:

A: Solution: Note: Hello! As you have posted more than 3 sub parts, we are answering the first 3…

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

A: We have given that when true population percentage is  p = 90% = 0.90 Significance level (α) = 1 -…

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.