A private opinion poll is conducted for a politician to determine what proportion of the population favors adding more national parks. How large a sample is needed in order to be 95% confident that the sample proportion will not differ from the true proportion by more than 4%?

Q: In order to have a margin of error of 2%, people should be surveyed.

A: we are given that 24% people consider summer as their favourite season (p) = 0.24 to find  number of…

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

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Q: Using a random sample of 3800 TV households, a media research company found that 50.3% watched the…

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Q: A survey shows that 3/5 Australian adults are overweight and 1/10 Australian adults are obese. What…

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Q: TV streaming subscription platforms have been taking over the entertainment industry. It is…

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Q: Nationally, 83% of Americans have earned a high school diploma.  We want to see if the proportion of…

A: We have to find sample proportion.

Q: A study sample was recruited to examine whether a smoking cessation program may be successful in the…

A: The objective of this question is to construct a 95% confidence interval for the true percentage of…

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: A researcher wants to find out the number of students he needs to urvey in a school provided that…

A: Given : total no pf students in a school  N=5000 with margin of error e=5%  To find sample size…

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

A: Sample Proportion The sample proportion describes the proportion of people during a sample with a…

Q: Linda Silbers is a social scientist studying voter opinion about a city bond proposal for a…

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

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

A: From the given data we can conclude that, Proportion = 25% Margin of error = 1.3%

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: Suppose that the results of a survey show that 38% of people consider summer as their favorite…

A: Given that p =0.38,Margin of error (E ) = 0.04 n =?

Q: In a village actually invaded by anthrax, 65% of the gouts were attacked and 90% have been…

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

A: Given: The proportion of people who like dark chocolate more than milk chocolate is 32% Margin of…

Q: among students of a certain university 38 like peanut butter, 34% like nutella, and 12% like both.…

A: It is given that:Proportion of students like peanut butter: Proportion of students like nutella:…

Q: A pollster wishes to estimate the proportion of United States voters who favor capital punishment.…

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Q: In 1995, it was determined that 78% of US citizens supported a ban on household aerosols. Thinking…

A: To find: 1.Test statistics 2.p-value

Q: If in a village actually involved by anthrax, 70 per cent of the goats are attacked and pei cent…

A:

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: The margin of error (E) is 0.03 and the confidence level is 0.95.

Q: ks whether books are checked out by an adult or a child. She records this data for every fourth…

A: d) Given the librarian, check the books returned by the adults or a child are tracked. She records…

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

A:

Q: Suppose 50% of all voters in a population support a politican, SHARE What is the zscore of sample…

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Q: A test question is good if it discriminates between prepared and unprepared students. The first…

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Q: The Arizona Department of Transportation wishes to survey state residents to determine what…

A: Solution-: Given: M.E.=0.03,α=0.01, We take, p^=0.5 and  q^=0.5  We find how many residents do they…

Q: A researcher wants to determine what proportion of all high school students plans to attend…

A: Obtain the critical value at 90% confidence level:It is given that the margin of error is 0.02. The…

Q: Suppose an internet marketing company wants to determine the percentage of customers who click on…

A: Margin of error=E=5%=0.05 , Confidence level=C.I=94%=0.94

Q: The proportion of commuters on PSU – Berks campus is purported to be 65%. A professor believes this…

A: Given P0=65% = 0.65 Let X = Number of commuters on PSU  X = 200 n = 300

Q: A software company is interested in improving customer satisfaction rate from the 54% currently…

A: Let p be the population proportion of customer satisfaction rate.Given that,Population proportion…

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…

Q: A group of researchers want to investigate the academic performance of the college students in…

A: Given that, N = 12000 Margin of error (e) = 0.05 The formula for calculating the sample size is,

Q: Suppose that I want to estimate the percentage of students who  love statistics in California. How…

A: Given information- Margin of error, E = 3% = 0.03 Confidence level, c = 90% Since nothing is known…

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.