say they approve of the way the mayor is doing their job.  If we wish to construct a 90% confidence interval for the true proportion of adults in this city who would say they approve, what is the appropriate margin of error? (Give your numeric response to at least 3 decimal places.  Give only your numeric response, and not any extra characters or

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A: The correct inference regarding the given interval of (-0.823, 0.573) is to be made from the given…

Q: Nina would like to estimate the difference in the mean amount of time students spend on math…

A: Total number of sample =30 90% confidence interval for the true difference in the population means,…

Q: Suppose you want to produce an estimate on the percent of students who return to college after their…

A:

Q: Suppose we wanted to estimate the average amount of sleep (in hours) a college student gets a night.…

A: Confidence interval : Confidence interval is a range of values it contains the true population…

Q: In a sample of 350 adults, 277 had children. Construct a 99% confidence interval for the true…

A: The sample size, i.e., the sampled number of adults, n=350.The sampled number of adults with…

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 600…

A:

Q: In a sample of 270 adults, 151 had children. Construct a 90% confidence interval for the true…

A: Given that  Sample size n =270 Favorable cases x =151 Sample proportion p^=x/n  =151/270 =0.5593

Q: Suppose that the a college wants to have an idea of the average SAT score of the incoming freshman…

A: The confidence level is 0.90, the standard deviation is 310 and margin of error E is 50.

Q: A surprising number of young adults (ages 19 to 25) still live in their parents’ homes. A random…

A: Given  X1=986, n1=2253, X2=923, n2=2629

Q: A survey of 45,535 adults showed that 20,901 were very concerned abut climate change. What is the…

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Q: A researcher wanted to check whether the percentage of Canadian adults with obesity has decreased in…

A: Number of Canadian adults in 2005= 75 Number of Canadian adults in 2009 = 120   significance level =…

Q: According to a report on consumer fraud and identity theft, Indiana had 1671 complaints of identity…

A:

Q: In a poll, Australians were asked if they thought unemployment would increase. At that time 263 out…

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Q: In a sample of 290 adults, 191 had children. Construct a 95% confidence interval for the true…

A: 0.604 < p < 0.713 Explanation:Approach to solving the question:To construct a 95% confidence…

Q: A survey of 45,535 adults showed that 20,901 were very concerned abut climate change. What is the…

A: It is given asFavourable cases, x = 20901Sample size, n = 45535Confidence level = 99%

Q: In a random sample of 500 Americans, 25% indicated that they have a cat for a pet. Estimate with 97%…

A:

Q: In a sample of 360 adults, 245 had children. Construct a 99% confidence interval for the true…

A:

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 600…

A: Obtain the 95% confidence interval for the true proportion of adult residents who are parents in…

Q: In a random sample of 500 Americans, 50% indicated that they have a cat for a pet. Estimate with 95%…

A: Given information

Q: A sample of 700 from population A has a proportion of interest of 0.24 while a sample of 600 from…

A: Confidence Interval: The form of the confidence interval is, CI = Point estimate ± Margin of error…

Q: In a sample of 350 adults, 277 had children. Construct a 99% confidence interval for the true…

A: Sample size, Number of adults having children, Confidence level is .

Q: The First National Bank of Wilson has 620 checking account customers. A recent sample of 70 of these…

A: Given that,N = 620n = 70x = 37Confidence interval(c) = 0.95The formula of the margin of error…

Q: You want to get a 95% confidence interval for the difference between the percentage of females with…

A:

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 100…

A: According to the given information, we have Out of 100 adult residents sampled, 88 had kids. 99%…

Q: According to a report on consumer fraud and identity theft, California had 1439 complaints of…

A: Let x denote the number of complaints of identity theft in California. x=1439 The total number of…

Q: According to a report on consumer fraud and identity theft, Montana had 1447 complaints of identity…

A: Given that, x=1447,n=3643 The sample proportion is,

Q: The police department wants to reduce the margin of error for their 95% confidence interval. If they…

A: Here Given  The police department wants to reduce the margin of error for their 95% confidence…

Q: If n=510 and p (p-hat) =0.47, find the margin of error at a 90% confidence level Give your answer as…

A:

Q: If n = 530 and X = 424, construct a 99% confidence interval for the population proportion, p. Give…

A:

Q: A student found that in a random sample of 300 people in a town, 105 play sports. Based on this…

A: Given that, X = 105 N = 300 90% confidence level

Q: A recent study by the McGraw-Hill company showed that 61% (1621) of college students use their…

A: Given, Proportion of college students use their smartphones for study = 0.61Total number of students…

Q: Suppose a researcher wants to test if the average diastolic blood pressure in Irish-Americans is…

A: It is given that the average diastolic blood pressure in the general population is 70 mmHg.…

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 400…

A: Solution: Let X be the number of parents had kids and n be the sample number of adults. From the…

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A: There are totally 500 visitors for women in which 325 people said they were satisfied with the…

Q: Suppose we wish to construct a 95% confidence interval for the population proportion of fans in…

A: Given that, Total fans = 200 130 answered yes 95% confidence level

Q: suppose a random sample of 50 basketball players have an average height of 78 inches. Also assume…

A: Solution: Let X be the random variable defined as the height of a basketball player. Sample size: n…

Q: In a sample of 470 adults, 306 had children. Construct a 99% confidence interval for the true…

A:

Q: Nearly one-half of Americans ages 25 to 29 are unmarried. How large a sample is necessary to…

A: The provided information is The margin of error is E=0.02 α=0.05 The critical value is zc=1.96…

Q: In a sample of 460 adults, 281 had children. Construct a 90% confidence interval for the true…

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Q: A Gallup poll of 1487 adults showed that 43% of the respondents have Facebook pages.  Construct a…

A: Confidence Interval: In statistics, we can say a range of values of the specified population…