4) A study of 12,000 cell phone users found that 125 of them developed cancer of the brain or nervous system. Write a 95% confidence statement for the percentage of all cell phone users who develop cancer of the brain or nervous system. МОЕ 3

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

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Q: 2. Suppose that you take a random sample of 360 people who voted in the last election in a heavily…

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Q: Suppose that the state of Nebraska wants to take a poll on the proportion of its citizens who…

A: Sample size: The minimum sample size for a desired confidence level, α with a given margin of error,…

Q: Suppose a consumer advocacy group wants to conduct a survey to find if the proportion of consumers…

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Q: Compute the margin of error of the 90% confidence level when a = 3 and n= 30

A: Given that  ?=3 , n=30 Formula for margin of error  E=Zc*?/√(n)

Q: A Pew Research Center report on gamers and gaming estimated that 49% of U.S. adults play video games…

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

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

Q: 3. A survey of 2,950 Filipinos showed that 2,655 trust the Supreme Court decisions on legal issues.…

A: Let X be the number of trust the supreme court decision on legal issues  n be the sample size  Given…

Q: Suppose a certain study reported that 27.7% of high school students smoke. Random samples are…

A: As per bartleby guideline expert have to answer first three subparts only..

Q: 4. 14 out of 20 voters in Pennsylvania reported having voted for an independent candidate. It is…

A: Critical Value: In a test of hypotheses, Critical Values are the cut-off values that provide the…

Q: suppose that we want a 95% confidence interval for π = proportion of defectives if we observe 4…

A: Given that, there are 4 defectives in 60 items tested. n=60 and x=4 Proportion of defective is given…

Q: es/CBS News poll sampled 523 adults who were planning a vacation during the next six months and…

A: We have 2015 as Population 1 and 2005 as Population 2. Then p1=Population proportion of Population…

Q: 2. A national health organization warns that 30% of the middle school students nationwide have been…

A: Given : n = 110 X = 21

Q: uman resources managers, 71% of respondents felt they should hire new staff within the next three…

A: The Upper limit can be calculated as: Upper limit = Point estimate (sample proportion) + Margin of…

Q: Suppose a random sample of 142 graduates admissions officers were asked what role scores on…

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

Q: 3) In a sample of 172 JCC full-time students, 61 of them prefer to come to campus to take their…

A: Solution: Given information: n= 172 Sample size of JCC full time students x= 61 students prefer to…

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

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

Q: 4. A college dean reported that 80% of all students majoring in Math are males. If 62 out of the 80…

A: 4] Followings are the explanation of the question  Use the One sample z proportion test   The…

Q: Suppose we know that a confidence interval for a population mean is (53, 67), with a margin of error…

A:

Q: The same Gallup poll asked its 1523 adult respondents and also 501 teens (ages 13 to 17) whether…

A: Given that  The same Gallup poll asked its 1523 adult respondents and also 501 teens (ages 13 to 17)…

Q: Suppose that we want a 95% confidence interval for π = proportion of defectives if we observe 4…

A: No. of items (n)=60No. of defective items (X)=4Sample proportion…

Q: 9. The Centers for Disease Control and Prevention reported a survey of randomly selected Americans…

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Q: Suppose we observed 15 successes in a random sample of 60 subjects. What is the 99% confidence…

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Q: 7. Why is a confidence interval also called a "margin of error"?

A: Margin of error allows us to feel confident a certain percentage of the time within a range of…

Q: 22. The probability that a 95% confidence interval calculated from a random sample of a normally…

A: The parameters are the numeric measured value of a population. Statistic is the numeric measured…

Q: 3. A medical technologist claims that 25% of the chain-smokers are teenagers. After making a survey…

A: 3)Givensample size(n)=42x=8p^=xn=842≅0.1905Confidence level=95%α=1-0.95=0.05

Q: Suppose that a random sample of 60 horror movies containing 100 character deaths was collected.…

A: we must identify zα/2 and the margin of error, E. The confidence level is stipulated to be 0.95,…

Q: In a survey of 3393 adults aged 57 through 85​ years, it was found that 82.8​% of them used at least…

A: (a). Obtain the number of subjects who used at least one prescription medicine: It is given that…

Q: Ten engineering schools in the United States were surveyed. The sample contained 250 electrical…

A: Given that  n1=250 , X1=80 , n2=175 , X2=40

Q: In a poll of 1000 likely voters, 560 say that the United States spends too little on fighting hunger…

A: Given, The sample proportion is, Critical value: Using z-table, the z-critical value at the given…

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

A: Here, there is no information about the population parameter. Hence, use the conservative estimate…

Q: Suppose we have the results of a Gallup survey (simple random sampling) which asks participants for…

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Q: wed that 122 involved uninsured drivers. Construct a 96% confidence interval for the proportion of…

A: A survey of 500 non-fatal accidents showed that 122 involved uninsured drivers. Let X be the number…

Q: The same Gallup poll asked its 1523 adult respondents and also 501 teens (ages 13 to 17) whether…

A: No. of adult respondents=1523 No. of teen respondents=501 Percentage of adults responding yes to…

Q: Suppose you are with a health agency that wants to estimate what percentage of Ohioans really has…

A: Given that the margin of error is 2%=0.02 Confidence level is 95% Therefore, the significance level…

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

A: Given:Margin of error (E) = 0.09Confidence level = 90%Since, the proportion of people that support…

Q: The student government association at a university wants to estimate the percentage of the student…

A: Solution

Q: It is believed that 29.92% of U.S. homes have a direct satellite television receiver. How large a…

A: Solution.

Q: A magazine publisher wishes to determine what proportion of current subscribes will renew. The…

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Q: A recent study suggested that 70% of all eligible voters will vote in the next presidential…

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Q: construct a 95% confidence interval for the true proportion of the population having banking…

A: It ia given that Sample size n = 100 Number of persons having banking relations with either the…

Q: Suppose a marketing company randomly surveyed 439 households and found that in 259 of them, the…

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Q: 3: In a poll of 1000 likely voters, 560 say that the United States spends too little on fighting…

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Q: A research company is interested in determining the true proportion of Americans that work remotely.…

A: Obtain the 90% confidence interval for the true proportion of Americans that work remotely. The 90%…

Q: A transportation planner wishes to estimate the proportion of commuters who drive to work within…

A: The provided information are: Margin of error (E) = 0.05 Confidence level = 90%

Q: 46. A quality-conscious disk manufacturer wishes to know the fraction of disks his company makes…

A: Given, Total discs n = 1067 No of non defective = 993 No of defective = 1067 - 993 = 74

Q: In 2013, the Gallup poll asked 1,039 American adults if they believe there was a conspiracy in the…

A:

Q: 2. A sample of 430 business applications included 150 men. Find the 99% confidence interval of the…

A: Answer:-  Given,  X=150 n=430

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

A: As there is no any estimates available, the sample proportion is assumed to be 0.50, that is,…

Q: Imagine that the confidence interval around a candidate's popularity score is [37.22,48.86],what is…

A: The confidence interval provides an estimated range of values that includes an unknown population…