Over half of all American teens (ages 12 to 17 years) have an online profile, mainly on Facebook. A random sample of 479 teens with profiles found that 367 included photos of themselves. (a) Give the 99.5% large-sample confidence interval for the proportion p of all teens with profiles who include photos of themselves. Large-sample Interval: to (b) Give the plus four 99.5% confidence interval for p . (The plus-four interval always pulls the results away from 0% or 100%, whichever is closer. Even though the condition for using the large-sample interval is met, the plus four interval is more trustworthy.) Plus four Interval

Q: A sample of 28 was taken from a population, and r = .45. What is the 95% confidence interval for the…

A: Correlation coefficient: Correlation analysis is used to measure strength of the association between…

Q: In a past general social survey 87 percent of a random sample of n=990 respondents answered yes to…

A:

Q: A study of 420,016 cell phone users found that 131 of them developed cancer of the brain or nervous…

A: Calculate the proportion of people who developed cancer of the brain or nervous system.

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A: Given that Sample size n = 827 Sample proportion of students who prefer a quarter system = 0.61 The…

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A: Sample size, n = 1294Number of successes, x = 517Confidence level = 95%

Q: A recent study was conducted in which a random sample of men and a random sample of women were…

A: Given:  Confidence Interval = (0.133,0.207) = (13.3%, 20.7%)

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Q: A clinic measured the systolic blood pressure for a random sample of 10 patients. The resulting 95%…

A: Given information: Sample size=10 The 95% confidence interval for the mean systolic blood pressure…

Q: A researcher wishes to estimate the proportion of adults in the city of Hawalli who are vegetarian.…

A:

Q: Campus athletics is interested in the proportion of registered students living on campus who play…

A: The 95% confidence interval is (0.12, 0.18).

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Q: b. In the year 2000, a survey of 977 U.S. adults were asked who they felt was the greatest…

A:

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Q: the following sample was taken from a normally distributed population: 20,27,15,2016,22 and 13. A…

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Q: General Social

A:

Q: A pharmaceutical company is running tests to see how well its new drug lowers cholesterol. Eleven…

A: From the provided information, Sample size (n) = 11 Confidence level = 95%

Q: A random sample of high school students is used to estimate the mean time all high school students…

A: Solution: From the given information, a 99% confidence interval is 1.7 hours to 3.1 hours.

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Q: Suppose that a 95% confidence interval for a population p = the population proportion of men who…

A:

Q: A 95% confidence interval for the average salary of all CEOs in the electronics industry was…

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Q: The tobacco industry closely monitors all surveys that involve smoking. One survey showed that among…

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Q: You drop by your local independent coffee shop on your way to class. While standing in​ line, you…

A:

Q: A study of 420,010 cell phone users found that 0.0319% of them developed cancer of the brain or…

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Q: In a survey of 1002 people, 70% said that they voted in a recent presidential election. In…

A: n=1002

Q: Gallup is a company that conducts daily opinion polls on a variety of topics. In a recent daily…

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Q: survey of an urban university showed that 750 of 1,100 students sampled attended a home football…

A:

Q: registered. Construct a 90% confidence interval for the proportion of first-time visitors who saw…

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Q: Out of a 54 person sample from our fall Math-150 classes, 12.4% of the students are left-handed.…

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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.