Before the 2008 presidential campaign, the Gallup Poll asked a sample of 1,000 people for whom they would vote for president; 52% said Obama. The margin of error announced by news reports of this poll was   A. ± 2%.   B. ± 3%.   C. ± 8%.   D. ± 4%.   E. ± 6%

Q: In a recent Gallup poll, pollsters randomly selected adults and asked them whether they smoke.…

A: Introduction There are 2 types sampling methods: Prob. methods Non-Prob. methods

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

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Q: USA today reported that about 20% of all people in the United States are illiterate. Suppose you…

A: Let success be defined as literate people. Probability i=of literate people (or success) is p=0.8…

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: Consider the following: at Bernhardt College, 200 (of the 3,000) students were polled and asked how…

A: From the given information, At Bernhardt College, 200 (of the 3,000) students were polled and asked…

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

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Q: Some states now allow online gambling. As a marketing manager for a​ casino, you need to determine…

A: Given Data : Margin of error: ME = 0.02 sample proportion: p̂ = 0.5…

Q: What proportion of 18-30 year olds suffered grievous injuries? 0.303 0.204 0.314 0.222 0.199 0.600

A: The given data is:Accident SeverityAge group of driversTotal18-3030-5050+Fatal27224089Grevious…

Q: Do 8% of Dallas citizens commute to work? A survey on commuting by car was done on a random sample…

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Q: In a sample of 508 men who worked at home, 32% of them were college graduates. a.) Among the 508 men…

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Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: The objective of this question is to estimate the proportion of tenth graders reading at or below…

Q: A survey of American households found that 1/4 had a land line, 7/12 had cable, and 1/3 had neither.…

A: It is an important part of statistics. It is widely used.

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

A: Givenconfidence level = 90%Margin of error(E)=2%=0.02p^=0.45

Q: The state education commission wants to estimate the fraction of tenth grade students that have…

A: The sample size is The number of students reading above the eighth-grade level is . The objective is…

Q: In a poll of 515 human resource professionals, 45.8% said that body piercings and tattoos were big…

A: sample size(n)=515sample proportion()=0.458

Q: What is the sample proportion such that 95% of all others is symmetric around 36%?

A: 1. A sample of 200 students is taken in which 36% of all college students use an Apple i phone only.…

Q: requires

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Q: In a local election, 56.0% of those aged under 40 and 48.8% of those aged over 40 vote in favor of a…

A: Independent Events:Two events are said to be independent if occurrence of one event does not affect…

Q: On Sunday, July 19, 2020, FoxNews, the strongly conservative news organization, released a national…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…

Q: A senator wishes to estimate the proportion of United States voters who favor new road construction.…

A: The margin of error is 5% and the confidence level is 98%.When there is no prior knowledge about the…

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

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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: s the newly hired manager of a company that provides cell phone service, you want to determine the…

A: It is given that margin of error (E) is 0.92 and the confidence level is 0.90.

Q: A survey reported that 10% of 1800 employees favored a new insurance program. How many employees…

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Q: It has been estimated that only about 30% of California residents have adequate earthquake supplies.…

A: The sample size (n) is 13 and p = 0.30.

Q: An environmentalist wants to find out the fraction of oil tankers that have spills each month. Step…

A: Sample size n=549Favorable cases x=98

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: 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: inted to compare two types of battery storage Une type is réfngerated and the other is room…

A: Hi thank you for posting this question,  since you have posted multiple subparts as per our policy…

Q: (a) What is the level of significance? State the null and alternate hypotheses. O Ho: The…

A: To test the claim that the census distribution and the sample distribution agree, we will use the…

Q: Suppose 20% of cars are sportscars and that 30% of sportscars are red, and that 25% of all cars are…

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Q: a. how many degrees of freedome are there in this table? b.how many cells are in this table? c.…

A: a. The degrees of freedom for the given table is, Thus, the degrees of freedom is 1.

Q: America OnLine published a survey question. Among the 2,300 Internet users who responded, 20%…

A: From the given information, America OnLine published a survey question. Among the 2,300 Internet…

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: according to the national household  survey on drug use and health, when asked in 2017, 31.0% of…

A: The National Household Survey on Drug Use and Health (NSDUH) is a comprehensive annual survey…

Q: Steele Electronics Inc. sells expensive brands of stereo equipment in several shopping malls. The…

A: Answer  Given  Sample size [n] =23 P =33%     =33/100    =0.33

Q: re residents (if any) must I ask, given the fact that (somehow) I know that 62 percent of all…

A: Given: Sample size, n = 32 Probability, p = 62100=0.62 Here the distribution is binomial and for a…

Q: In a survey of 3428 adults aged 57 through 85 years, it was found that 87.6% of them used at least…

A: From the provided information, Sample size (n) = 3428 It was found 87.6% of them used at least one…

Q: If 61% of Americans believe most school textbooks favor political correctness over accuracy, how…

A: Here we have given the information, 61% of Americans believe most school textbooks favor political…

Q: The Humane Society is interested in finding out how many households in America have at least one…

A: The provided information are: Confidence level = 95% = 0.95 Margin of error (E) = 4% =0.04 From the…

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.