5. In a pre-election poll, a pollster finds that 552 out of 1025 people polled favor Smith. Construct the 95% confidence interval for the proportion of people in the whole population who favor Smith.

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…

A:

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: ) When 415 junior college students were surveyed, 150 said they have a passport. Construct a 95%…

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Q: If n = 400 and X = 25, construct a 99% confidence interval estimate for the population proportion

A: It is given that Sample size n = 400 Numbervof sucessess, X = 25 The critical value of Z at 99%…

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

A: It is given that margin of error (E) is 0.03 and the confidence level is 0.90.

Q: A collage professor would like to estimate the proportion of students who pull an *all-nighter,"…

A: Given: n = 100 99% Confidence interval = (0.48 to 0.62) Formula Used: Confidence interval = p^ ±…

Q: If n=550 and ˆpp^ (p-hat) =0.25, find the margin of error at a 99% confidence level Give your…

A: The margin of error = The margin of error (ME) expresses to the maximum expected differences between…

Q: 2. A nutritionist wants to know the population proportion of Grade 1 learners who eat vegetables.…

A: We have given thatn = 1200x = 200p̂ = x/n = 200/1200 = 0.167Significance level (α) = 1 - 0.95 = 0.05

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: If n=520 and p (p-hat) =0.47, find the margin of error at a 90% confidence level Give your answer to…

A: Given data,n=520p=0.47z-value at 90% confidence is Zc=1.645Margin of error(E)=?

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: If n=320 and p' (p-prime) = 0.82, construct a 95% confidence interval. Give your answers to three…

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Q: If n=280 and ˆpp^ (p-hat) =0.83, find the margin of error at a 99% confidence level Give your…

A: The margin of error = The margin of error (ME) expresses the maximum expected differences between…

Q: Suppose you calculate a 99% confidence interval to be: 13.05 to 20.75. Determine the margin of error

A: Given data: The given upper limit is b=20.75. The given lower limit is a=13.05.   The expression for…

Q: Out of 1,500 licensed drivers, 900 admitted that they do not like to drive at night. What is the 92%…

A: Given Information:  Total Number of drivers = 1500  Number of drivers that do not like to drive at…

Q: A magazine provided results from a poll of 500 adults who were asked to identify their favorite pie.…

A: The provided information is p=0.14q=1-p=1-0.14=0.86n=500E=3%=0.03p-Represents the proportion of…

Q: If n=360 and p (p-hat) =0.29, find the margin of error at a 95% confidence level Give your answer to…

A: Given that : Sample size (n) = 360 P(hat) = 0.29 Confidence interval is 95%  We use here, Margin of…

Q: If n=450 and ˆpp^ (p-hat) =0.48, find the margin of error at a 99% confidence level Give your…

A: Given n=450 and p^=0.48, level of significance ɑ=0.01

Q: 1. Suppose survey results say that 69% of the adult females from a sample taken in the United States…

A: Proportion (p) = 69 %  Margin of Error (E) = 3%  Alpha = 95%  FIRSTLY calculate the confidence…

Q: A cable company claims that 88% of its customers are fully satisfied with their service. A…

A: Given that  Sample size n =350 Favorable cases x =287 Sample proportion p^=x/n  =287/350 =0.82

Q: If n=210 and ˆpp^ (p-hat) =0.86, find the margin of error at a 90% confidence level Give your…

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Q: In a survey of 1000 randomly selected adults in the US, participants were asked what their most…

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Q: 4) A study of 12,000 cell phone users found that 125 of them developed cancer of the brain or…

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Q: 5, Randomly selected middle-aged people in both China and the United States were asked if they…

A: For China, n =1300 and x = 1170 therefore p^1 =11701300 = 0.9 For USA,  n = 150 and x =110 p^2…

Q: If n=270 and ˆpp^ (p-hat) =0.59, find the margin of error at a 99% confidence level Give your…

A: Given  n=270, pcap=0.59, alpha=0.01 Zcritical=2.578 at alpha=0.01 We want to find margin of error

Q: f n=300 and ˆpp^ (p-hat) =0.18, find the margin of error at a 99% confidence level Give your answer…

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Q: If n=490 and ˆpp^ (p-hat) =0.46, find the margin of error at a 99% confidence level.Give your answer…

A:

Q: 42. Show that in Example 4.4.7, page 153, the difference between the two candidates is statistically…

A: Here, we have to show that the difference between the two candidates is statistically significant…

Q: If n=170 and ˆpp^ (p-hat) =0.23, find the margin of error at a 99% confidence level Give your…

A: Find z-critical value:…

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 national health organization warns that 30% of the middle school students nationwide have been…

A: Given Data Sample Size, n = 110 Number of successes, x = 21

Q: If n = 520 and p^ = 0.85, construct a 99% confidence interval

A: Here, n = 520 and p hat = 0.85.

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: b. If many groups of 537 randomly selected Americans were surveyed, then a different confidence…

A: ANSWER:-  95% confidence interval means 95% confident contains true mean of the population. Means…

Q: Suppose we know that a confidence interval for a population proportion is (0.105,0.355), with a…

A: Obtain the margin of error. The margin of error is obtained below: Margin of Error: The margin of…

Q: If n=330 and p (p-hat) -0.27, find the margin of error at a 90% confidence level Give your answer to…

A:

Q: Suppose you calculate a 99% confidence interval of 14.71 to 21.64. Determine the margin of error.

A: Given information- We have given a value of 99% confidence interval is- C.I = (14.71, 21.64) Lower…

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: If n = 360 and p (p-hat) =0.88, find the margin of error at a 90% confidence level. Round to 4…

A: Find z-critical value:…

Q: 2) Suppose a college is planning to hold an event for students. In the survey of 130 on-campus…

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Q: If n=410 and p (p-hat) =0.47, find the margin of error at a 90% confidence level Give your answer to…

A: The random variable X follows binomial distribution. The sample size is 410. The sample proportion…

Q: suppose that in sampling for the population proportion, it is found that 20 out of 100 items are…

A:

Q: If n=350 and p (p-hat) =0.28, find the margin of error at a 99% confidence level Give your answer to…

A: n = 350p^ = 0.2899% confidence level

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…

Q: a. Suppose that a random sample of 41 state college students is asked to measure the length of their…

A: Since you have posted multiple sub-parts, we will solve the first three sub-parts for you. To get…