Another statement in the NSFG was "Marriage has not worked out for most people I know." 36.2% of females agreed, while 31.5% of males agreed. The standard error is .08. Calculate the 95% confidence intervals. Interpret the confidence intervals, and also determine if the difference between females and males is statistically significant.

Q: If n 20, 40, and s 20, construct a confidence interval at a 90% confidence level. Assume the data…

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Q: If you increase the confidence level, the confidence interval  A. Gets wider B. gets narrower  C.…

A: We know that-The confidence interval is given byHere, x¯ = sample meanσ = population standard…

Q: If n = 15, 43, and s = 9, construct a confidence interval at a 98 % confidence level. Assume the…

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Q: If n=30, (x-bar)=38, and s=8, construct a confidence interval at a 90% confidence level. Assume the…

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Q: na survey, 25 people were asked how much they spent on their child's last birthday gift. The results…

A: Given data,

Q: If n=28, (x-bar)=50, and s=10, construct a confidence interval at a 99% confidence level. Assume the…

A: Sample size n=28Sample mean=50Standard deviation =10

Q: A survey of 81 individuals finds that the average amount they spend on entertainment each month is…

A: Given  n=81, Xbar=145,s=54 We want to find 95% CI for population mean

Q: 2. A recent study of 25 students showed that they spent on average of $18.35 for gasoline per week.…

A: Given  x̄ = 18.35 n=25 s=3 degree of freedom = df = n -1 = 25-1 = 24 significance level α = 0.10…

Q: 5. Attending sporting events is a popular source of entertainment. When 1000 people were surveyed,…

A: Given that 1000 people were surveyed. Therefore the sample size is  n=1000 After survey it is found…

Q: For the same sample proportion and sample size, what happens to the width of a confidence interval…

A: Solution-: For the same sample proportion and sample size, what happens to the width of a confidence…

Q: Believe it or not, there are some people who dont think that Duke will win the NCAA tournament this…

A: Obtain the 90% Confidence Interval for the IQ of DDs.   The 90% Confidence Interval for the IQ of…

Q: If n=31, (x-bar)=49, and s=3, construct a confidence interval at a 80% confidence level. Assume the…

A: Given, Sample size = 31 Sample mean = 49 Sample standard deviation = 3   Since the population…

Q: If n = 22, ¯xx¯ = 36, and s = 14, construct a confidence interval at a 98% confidence level. Assume…

A: From the provided information, Sample size (n) = 22 Sample mean (x̄) = 36 Standard deviation (s) =…

Q: If n = 28, ¯xx¯ = 49, and s = 19, construct a confidence interval at a 90% confidence level. Assume…

A: Given information- Sample size, n = 28 Sample mean, x-bar = 49 Sample standard deviation, s = 19…

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: If n = 16, 7 = 43, and s = 17, construct a confidence interval at a 98% confidence level. Assume the…

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Q: If n=13, (x-bar)=48, and s=12, construct a confidence interval at a 95% confidence level. Assume the…

A: Mean = 48Standard deviation = 12Sample size = 13

Q: If n=12, (x-bar)=33, and s=16, construct a confidence interval at a 80% confidence level. Assume the…

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Q: If n = 370 and p=0.31p, construct a 90% confidence interval. This should be rounded to three decimal…

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Q: Suppose that a manager is interested in estimating the average amount of money customers spend in…

A: Given information 95% confidence interval is between $31.84 and $38.66 Confidence interval gives…

Q: A magazine article conducted a survey of 1000 people in Washington State and found that 26% of the…

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Q: If n = 25, ¯x = 50, and s = 19, construct a confidence interval at a 99% confidence level. Assume…

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Q: If n=41n=41, ¯xx¯=36, and s=9s=9, find the margin of error for a 80% confidence level.

A: Answer - Given, Sample size n = 41,    x  = 36    and s = 9               80% confidence interval…

Q: Find the condence level and a for a. a 90% confidence interval.b. a 99% confidence interval.

A: a.The confidence level and α for a 90% confidence interval is obtained below:The confidence level is…

Q: If n-19, ž(x-bar)-43, and s-8, construct a confidence interval at a 90% confidence level. Assume the…

A: Given: n = 19, x¯ = 43, s = 8 Confidence level = 90%

Q: If n = 15, ¯x = 50, and s = 9, construct a confidence interval at a 90% confidence level. Assume the…

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Q: If n=540 and (p-hat) = 0.13, construct a 99% confidence interval. Give your answers to three…

A: We have given that,  Sample size (n) = 540  Sample proportion (p-hat) = 0.13 Then,  We will find the…

Q: one with a 95% confidence level and the other with a 99.7% confidence level. Which interval is…

A: Confidence interval is probability, which refers that population parameter will fall within set of…

Q: In a survey, 17 people were asked how much they spent on their child's last birthday gift. The…

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Q: If n=12, x=47, and s=7, construct a confidence interval at a 98% confidence level. Assume the data…

A: According to the provided information,

Q: If n = 17, ¯xx¯ = 33, and s = 6, construct a confidence interval at a 99% confidence level. Assume…

A: We have, If n = 17, x¯ = 33, and s = 6, alpha=1-0.99= 0.01 Therefore  Degrees of freedom= n-1=16…

Q: If n=22, ē(x-bar)=42, and s=19, construct a confidence interval at a 80% confidence level. Assume…

A: Solution: From the given information, n=22, x-bar=42 and s=19.

Q: In a survey, 24 people were asked how much they spent on their child's last birthday gift. The…

A: From the available information, Sample size, n =24 Sample mean, x = 31 Sample standard deviation, s…

Q: Which of the following confidence intervals would have a wider width for the same set of data? A 90%…

A: We have to find which of the following confidence intervals would have a wider width for the same…

Q: In a survey, 25 people were asked how much they spent on their child's last birthday gift. The…

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Q: In a survey, 14 people were asked how much they spent on their child's last birthday gift. The…

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Q: You will need your z and t charts for this  Death penalty: A group claims that the overall feelings…

A: The question is about confidence interval.Given :No. of interviewed people ( n ) = 643No. of people…

Q: In a survey, 15 people were asked how much they spent on their child's last birthday gift. The…

A: The sample mean is 32 and standard deviation is 14.

Q: A researcher examined the extent of cooperation among kindergarten children. She unobtrusively…

A:

Q: If we calculate a 95% confidence interval (CI) instead of a 99% confidence interval, then: A. The…

A: Here we need to choose from the correct option. We know that as the level of confidence decreases…

Q: Part A. Which of the following statements is/are always true? [Select] I. A 90% confidence interval…

A: It is given that the statements about to the confidence interval. Here, need to find out the correct…

Q: a sample of 25 automobiles shows that the mean price was $20,500 with standard deviation of $2,500.…

A: Givensample size = n = 25Mean price = $20,500Standard deviation = $2500 The distribution is normal.…

Q: Do more than 50% of U.S. adults feel they get enough sleep? According to Gallup's December 2004…

A: Sample size =1003 Number of US adults surveyed said that get enough sleep =552  We have to find the…