Lying about age Pew Research, in November 2011,polled a random sample of 799 U.S. teens about Internet use. 49% of those teens reported that they had misrep-resented their age online to gain access to websites and online services.a) Find the margin of error for this poll if we want 95%confidence in our estimate of the percent of Americanteens who have misrepresented their age online.b) Explain what that margin of error means.c) If we only need to be 90% confident, will the marginof error be larger or smaller? Explain.d) Find that margin of error.e) In general, if all other aspects of the situation remainthe same, would smaller samples produce smaller orlarger margins of error?

Q: Professor Jennings claims that only 35% of the students at Flora College work while attending…

A: Given: Sample size,n= 76 Number of students who have jobs,x= 35  Level of significance=0.05

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A:

Q: Most adults would erase all of their personal information online if they could. A software firm…

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Q: Why does Texas have some of the lowest voter turnout statistics in the nation?

A:

Q: d) Is the mean, median, or mode the best measurement of central tendency? Explain.

A: to find mean valuemean = sum of observations/ count of observationsmean = (102 + 100 + 115 + 100 +…

Q: A community is considering raising funds to pay for improvements to the community swimming pool. To…

A: Convenience sampling: A convenience sample is a type of non-probability sampling method where the…

Q: Provide a convincing argument why one can’t “lie” with statistics.

A: It is impossible to “lie” with statistics because statistics are based on facts and data.

Q: Imagine that the pregnancy test accurately indicates pregnancy in 97.5% of the people who have it.…

A: The miss rate will be 2.5%

Q: Public Policy Polling recently conducted a survey asking adults across the U.S. about music…

A: Given that

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A: Given: Number of employees (n) = 115

Q: Some people are concerned that new tougher standards and high-stakes tests adopted in many states…

A: Given : x = 210 n = 1782 Hypothesis : H0 : p ≤ 0.103 Ha : p > 0.103 p^ = 2101782 p^ = 0.1178 sp^…

Q: What are the null hypothesis ( H0 ) and the alternative hypothesis ( H1 ) that should be used for…

A: a) null Hypothesis H0 - μ =145     Alternate Hypothesis H1 - μ <> 145 (μ not equal to 145) b)…

Q: One personality test available on the World Wide Web has a subsection designed to assess the…

A: Given data Hypothesized mean = 142 Population Standard deviation = 25 Sample size n = 100…

Q: An executive for a large company is considering a change to health insurance plans offered to the…

A: An executive for a large company is considering a change to health insurance plans offered to the…

Q: Is there any skewness suggested by the mean, mode and median of the ungrouped data?

A: Skewness means lack of symmetry. The values of mean, median and mode fall at different points, they…

Q: Although Nielsen Media research determined the precise proportion of all Americans watching the…

A: Given : Nielsen Media research determined the precise proportion of all Americans watching the super…

Q: Most adults would erase all of their personal information online if they could. A software firm…

A:

Q: Explains the concept of bias, related to the mean, mode, and median.

A: Step 1: Statistical bias refers to the difference between the expected value and the true value of…

Q: What decisions can be made on the basis of The Harris Poll survey that measures the reputations of…

A:

Q: You are hired to study the statistical relationship between the number of trees and the number of…

A: From the above given data the following solution is provided below

Q: Why is it important to report both a measure of central tendency and variability to describe a set…

A: Basic idea about measures of central tendency and dispersion Measure of Central tendency is the…

Q: A national study report indicated that 20.5% of Americans were identified as having medical bill…

A: Given: n= 400 ,x= 95.0 p= 0.205 p̂= 95 / 400

Q: Pick a sample problem where despite correlation, causation cannot be reasonable argument.

A: Let us take an example of sales of umbrella and sales of raincoats. Sale of raincoats Sale of…

Q: How does an observed sample mean qualify as a common outcome?

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Q: n this social networking site differ by gender? The following sample data show the number of women…

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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.