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

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: How do you calculate the sample variance for proportions when the sample is drawn from a dichotomous…

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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: 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: What is the sampling error for an estimate of the population proportion, p = 0.36, if the true…

A: We have to find the sampling error for an estimate of the population proportion

Q: newspaper infographic titled "Social Media Jeopardizing Your Job?" summarized data from a survey of…

A: Given: It is assumed that the sample is the representative of population. Thus, Sample…

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

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Q: What is the difference between sample means and a distribution of sample proportions?

A: Given : Sample mean : Average of sample observations is known as "sample mean". Sample proportion :…

Q: Sample Proportion. Nielsen Media Research determined the precise proportion of all Americans…

A: Definition: Sample proportion : It is the quantity which measures the success of proportion.   Here,…

Q: What do you think is the reason, why researchers prefer to get a sample from the total population…

A: A researcher can carefully design the study which to a large extent try to prevent the biases and…

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

A: Let proportion be p=0.50 E=0.02 z-value at 95% confidence is Zc=1.96 n=?

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

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Q: Mother smoking Infant colic Yes No Total status Yes 15 167 182 No 111 2477 2588 Total 126 2644 2770

A: The given data is as follows:Mother smoking statusInfant…

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

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

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Q: Is a population proportion a parameter or a statistic? What about a sample proportion? Explain your…

A: Parameter: Any statistical measure based on all units in the population is called Parameter.…

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

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: What is the difference between the sample mean and sample proportion in statistics? How about…

A: -> The sample mean and sample proportion, these both come under descriptive statistics that…

Q: What does the test of a single proportion entail?

A: The One-Sample Proportion Test is used to assess whether a population proportion (P1) is…

Q: For a sample of n=16 scores, how many scores are used to calculate the sample variance?

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Q: Explain about if larger the sample size, what does this reflects.

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

A: Given Population proportion, p=0.4 Margin of error, E=1.5100=0.015 confidence level=0.99 level of…

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: In politics, marketing, etc. we often want to estimate a percentage or proportion p. One calculation…

A: Here the proportion of people liking dark chocolate is 37% with a margin of error 2.5%  So, the…

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.