To monitor a close election between two candidates, a news organization decides to take an opinion poll using a random sample of potential voters. The news organization wants the estimate be very precise—within ±1 percentage point (i.e. ±.01) with a 95% confident interval. What is the necessary sample size for this? Note: a close election assumes that either candidate has a 50 percent (i.e. p=.5) chance of winning.

Q: A 2016 Pew Research poll found that 18% of cell phone owners use their phone for conducting…

A: It is given that the total number of cell phone uses are 18%, thus the population proportion is…

Q: A university dean wants to estimate the percentage of students at her university who drink alcohol…

A:

Q: a certain presidential election, Alaska's 40 election districts averaged 1,953.8 votes per district…

A: given data, bell- shaped distribution μ=1593.8σ=572.2x= number of votes for this candidate for an…

Q: n the past, 13% of all homes with a stay-at-home parent, the father is the stay-at-home parent. An…

A:

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

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A:

Q: The number of successes and the sample size are given for a simple random sample from a population.…

A: # Given, the sample size  n=100     A sample random sample x=69

Q: In a poll of 1000 randomly selected voters in a local election, 60 voters were in favor of fire…

A: Given: Sample size (n) = 1000 Let "x" be the voters in favor of fire department bond measures. x =…

Q: A poll for a statewide election has a margin of error of 2.14 percentage points. How many voters…

A: From the provided information,Margin of error (E) = 0.0214Confidence level = 99%

Q: In a survey of 3700 TV viewers, 834 said they watch network news programs. Find the margin of error…

A: Solution

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A research…

A: Given,

Q: 1) Assume the p=.03 (3%). How large a sample is needed to estimate the proportion of breast cancer…

A:

Q: A poll reported 38% support for a statewide election with a margin of error of 1.36 percentage…

A: Proportion of voters who supports for a statewide election Margin of error Confidence level

Q: A company produces men’s jeans that can be styled with either a regular cut or a boot cut. In an…

A:

Q: UCLA would like to conduct a study to estimate the proportion of all UCLA students attending…

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Q: Based on past experience, a hiring manager believes that less than one-third of applicants are…

A:

Q: A poll for a statewide election has a margin of error of 1.3 percentage points.   How many voters…

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Q: Environmental Health Much discussion has taken place concerning possible health hazards from…

A:

Q: Determine the necessary sample size. A pollster wishes to estimate the true proportion of U.S.…

A: Given data, p=0.50 E=2%=0.02 z-value at 95% confidence is Zc=1.96 n=?

Q: A researcher wishes to estimate, with 93% confidence, the percentage of people who own a home…

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Q: Assume that a sample is used to estimate a population proportion p. Find the 95% confidence interval…

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Q: Online customer service is a key element to successful online retailing. According to a marketing…

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Q: Historically, the proportion of car parks in a particular city that offer early discount fees is…

A: a. Consider that p is population proportion of car parks in a particular city that offer early…

Q: Suppose the Humane Society claims that 30% of U.S. households own cats. You believe your community…

A: given data, claim:p≠0.30n=30030% owns cat p^=0.30α=0.10we have to complete hypotheisis for the given…

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A: Given information n = 997, x= 496, p=0.47

Q: A poll reported 60% support for a statewide election with a margin of error of 3.35  percentage…

A: The question is about sample size estimationGiven :Proportion of voters who supports for a statewide…

Q: A poll reported 37% support for a statewide election with a margin of error of 4.18 percentage…

A:

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A research…

A: A margin of error tells us how many percentage points your results will differ from the…

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A:

Q: In a random sample of 144 observations, the sample proportion is 0.90. Construct a 95% confidence…

A: given data sample size (n) = 144P^ = 0.9095% ci p.

Q: Your state is considering raising the legal age for consumption of alcoholic beverages to 21 years…

A: p = 0.5 Margin of error = 0.01

Q: 4) Out of the 440 people surveyed, a 110 said they listen to Spotify at least one a month. With the…

A:

Q: At a high school with over 500 students, a counselor wants to estimate the mean number of hours per…

A: Note that ,  For given random and independent samples of N observations each (taken from a normal…

Q: assume that a sample is used to estimate population proportion p. find the 95% confidence interval…

A:

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.