Find and interpret a 95% confidence interval for the proportion p of US 8th-grade students who drink alcohol. (b) Give the best estimate for p and give the margin of error for the estimate.

Q: Isabel Myers was a pioneer in the study of personality types. According to one of her surveys, in a…

A: Solution

Q: Several years ago, 44% of parents who had children in grades K-12 were satisfied with the quality of…

A: The claim is that 44% of parents who had children in grades K-12 were satisfied with the quality of…

Q: In the laboratory you analyzed a soft drink for its caffeine content with the following results:…

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Q: Why does increasing the confidence level result in a larger margin of error?

A: We know that the Margin of error is directly proportional to the test statistic's critical value,…

Q: University personnel are concerned about the sleeping habits of students and the negative impact on…

A: Given Information: Sample size (n) = 377 Out of which X = 209 students reported experiencing…

Q: Several years ago, 36% of parents who had children in grades K-12 were satisfied with the quality of…

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Q: Samesex marriage: In a recent 2015 ABC News/Washington Post poll, 1,016 adults nationwide answered…

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Q: In a poll conducted by the Gallup organization in April 2013, 48% of a random sample of 1022 adults…

A: Obtain the 95% confidence interval for the proportion of all U.S. adults in April 2013 who felt that…

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Q: Several years ago, 39% of parents who had children in grades K-12 were satisfied with the quality of…

A: From the provided information, 39% of parents who had children in grades K-12 were satisfied with…

Q: *** a. Use the sample data to construct a 90% confidence interval estimate of the percentage of cell…

A: A study of 420,041 cell phone users found that 0.0314% of them developed cancer of the brain or…

Q: Information about a sample is given. Assume that the sampling distribution is symmetric and…

A: Given,   Sample mean = 60 Standard error = 3   The objective is to construct the 95% confidence…

Q: cording to a report in USAToday, more and more parents are helping ndom sample of 40 young adults…

A: The formula to construct confidence interval is, p^±Zα/2*p^(1-p^)n The formula for margin of error…

Q: A telephone poll of 1,000 adult Americans was reported in an issue of a news magazine. One of the…

A: A telephone poll of 1,000 adult Americans was reported in an issue of a news magazine. One of the…

Q: A computer store near campus is stocking its shelves and wants to know the relative proportions of…

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Q: A health insurance firm wants to estimate the proportion of a population that would receive the flu…

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Q: 20. OxyContin The drug OxyContin (oxycodone) is used to treat pain, but it is dangerou because it is…

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Q: Family Closeness. A study conducted among college students evaluated the connection between drug use…

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Q: Several years ago, 43% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given  Several years ago, 43% of parents who had children in grades K-12 were satisfied with the…

Q: tis A poll found that people from the north now have relatively warm feelings toward people from the…

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Q: Cough and Headache At the 98% confidence level, should be nurse inform the managers that their…

A: The number of sampled patients that complained of cough and headache, n=230.The number of patients…

Q: (a) Construct and interpret a 95% confidence interval for the mean price paid for coffee in 2015 by…

A: given   n =105       x¯  = 3.42     σ  =0.75 a) confidence interval  limits are    [x¯-   αZ/2 (σ/n)…

Q: What is the relationship between α and the confidence level of a hypothesis test?

A: In hypothesis testing, α is the level of significance, which provides details about the chance of…

Q: A researcher is interested in testing the claim that the proportion of children (ages 8-12) who like…

A: given data sample 1  :children    n1  = 53sample 2 : teenager    n2   = 112ci for difference in…

Q: Several years ago, 44% of parents who had children in grades K-12 were satisfied with the quality of…

A: We have given that 44% of parents who had children in grades K-12 were satisfied with the quality of…

Q: Several years ago, 46% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given information Population proportion p = 0.46 We have given that; a recent poll asked 1,045…

Q: In a study of government financial aid for college​ students, it becomes necessary to estimate the…

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Q: You are going to construct a 99% confidence interval for the proportion of hip replacement…

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Q: A 95% confidence interval is narrower than a 90% confidence interval for the same data set. O True O…

A: We have to find given probability.

Q: A statistics instructor was interested in the proportion of all Kent State students who live on…

A: The proportion that students at Kent State live on campus is obtained below:From the given…

Q: Several years  ago, 41 % of parents who had children in grades  K-12 were satisfied with the quality…

A: Given,n=1175x=477p^=xnp^=4771175=0.4061-p^=1-0.406=0.594α=1-0.90=0.1α2=0.05Z0.05=1.645

Q: A survey commissioned by the Southern Cross Healthcare Group reported that 16% of New Zealanders…

A: 1.Suppose p is the true population proportion of people, who consume five or more servings of drinks…

Q: A study was being done to estimate the proportion of students who receive financial aid. If the…

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Q: Each man in a random sample of n = 16 men between 30 and 39 years old is asked to do as many sit-ups…

A: We have given that,  Sample mean (x̄) = 24.2, standard deviation    (s) = 8 and sample size (n) = 16…

Q: Several years ago, 39% of parents who had children in grades K-12 were satisfied with the quality of…

A:

Q: Several years ago, 43% of parents who had children in grades K-12 were satisfied with the quality of…

A:

Q: Several years ago, 46% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given  p=0.46, n=1055, X=488

Q: Several years ago, 48% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given : n = 1035 X = 497

Q: Student Debt – Vermont: The average student loan debt of a U.S. college student at the end of 4…

A: The confidence interval (CI) is a range of values that’s likely to include a population value with a…

Q: Intellectual development (Perry) scores were determined for 21 students in a first-year,…

A: Given data :  n = 21 Average  students  = 3.27 SD = 0.40 9% of CI

Q: indicated that they were satisfied. Construct a 99% confidence interval to assess whether this…

A: here given , Several years ago, 35% of parents who had children in grades K-12 were satisfied with…

Q: The percentage of Texans not covered by health care insurance in 2015 was 17%. The Texas Health and…

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Q: A marketing study with a random sample of 400 results in 160 subjects reacting positively to the…

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