% confidence interval for the true population

Q: A recent study of high school students shows the percentage of females and males who have at LEAST…

A: The (1-α)% confidence interval for the difference in population proportions p1-p2 is given by;…

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: A random survey of 495 adults found that 59 had diabetes. Which of the following is a 98% confidence…

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Q: A volunteer wearing a caveman mask was scolded by 158 out of 444 crows he encountered, and the crows…

A: Given information, In a study, a volunteer wear a caveman mask scolded by 158 out of 444 crows he…

Q: d. FIND t a n = 10 for the 90% confidence interval for the mean. %3D

A: d. Given: n=10 α=0.1 The degrees of freedom is obtained as below: df=n-1=10-1=9 Critical value: The…

Q: Find z, for the 84% confidence interval for the population mean. O a. 0.7955 O b. 1.44 O c. None O…

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Q: 1. We are interested in determining if absences from a class affect your overall class grade. The…

A: Hey, since there are multiple subparts posted, we will answer first three subparts. If you want any…

Q: Which of the following is thet-value for a 95% confidence level when the sample size is 20. O a.…

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Q: A 95% confidence interval for the proportion p active voters in the municipality of Aibonito is 0.57…

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Q: Find a 95% confidence interval for a mean, µ, where n = 324, x̄ = 2.7, s = .91, and se = .06.

A: Given: n = 324, x̄ = 2.7, s = .91, se = .06.

Q: A random sample of size n₁ = 23, taken from a normal population with a standard deviation 01 = 6,…

A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will…

Q: A sample of 100 homes in city A and 100 homes in City B was taken to estimate the proportion of the…

A: Given that, A sample of 100 homes in city A and 100 homes in city B were taken to estimate the…

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: 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: construct a confidence interval at a 98% confidence level.

A: Given : n=29 , X-bar=39  , s=11  , α=0.02 Since , the population standard deviation (σ) is unknown.…

Q: In a random sample of 850​ Americans, 385 reported that they work two jobs. Which of the following…

A: The known values are, The sample proportion is,

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

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Q: Out of all the students that attend Yale University, 1,982 were selected to participate in a school…

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Q: Which of the following will decrease the width of a confidence interval for the proportion? I.…

A: It is given that the width of a confidence interval for the proportion will decrease.

Q: A local health centre noted that in a sample of 400 patients, 80 were referred ta hospital. a.…

A: Given, n = 400            x = 80 Therefore, population proportion p^ = 80400 = 0.2 The critical…

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: Construct the confidence interval for the population mean y. C= 0.90, x=16.6, o= 10.0, and n= 80

A: Here, C=0.90, x=16.6, σ=10.0, and n=80.

Q: sample of 16 students was taken from university. These students spent an average of $170 on books…

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Q: The confidence interval at the 95% confidence level for mu(u) was reported to be (69.7, 90.3). Which…

A: Given, 95% confidence interval is (69.7, 90.3) lower limit at 95% C I = 69.7 upper limit at 95% C I…

Q: own residents were interviewed and it was found that 422 responded favorably to a question while 501…

A: given data, 422-favorably responded501-negetively responded 923- total  interviewed for positive…

Q: A​ 95% confidence interval for the proportion of U.S. adults who subscribe to some sort of streaming…

A: In the above question, we are given,  a confidence interval is

Q: A sample of size 84 was taken from a very large population. Sample statistics, x¯ and s, were used…

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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 = 18, = 46, and s = 16, construct a confidence interval at a 90% confidence level. Assume the…

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Q: 13, ¤(x-bar)=39, and s=16, construct a confidence interval at a 90% confidence level. Assume the…

A: From the given information, n=13 x-bar=39 s=16 Confidence level=90% Significance level=10%…

Q: A statistics instructor randomly selected four bags of​ oranges, each bag labeled 10​ pounds, and…

A: Given X-bar=9.45 n=4

Q: B. Find the confidence intervals for the population mean from the given information. 3. X = 28, 4. X…

A: Hey, since there are multiple subparts posted, we will answer first three subparts. If you want any…

Q: FIND t a n = 15 for the 98% confidence interval for the mean.

A: Provided information that, n=15 Alpha (α)=1-0.98=0.02 α/2=0.01

Q: Out of 800 adults selected randomly from one town, 272 have health insurance. Find a 90% confidence…

A: Given,   The sample proportion is,

Q: If n=14, (x-bar)=46, and s=18, construct a confidence interval at a 80% confidence level. Assume the…

A: Since population standard deviation is unknown, Use t-distribution to find t-critical value. Find…

Q: A marketing research company is estimating which of two soft drinks college students prefer. A…

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Q: Which of the following would result in the narrower confidence interval?

A: Note: The confidence interval with small confidence level has the narrower confidence interval. The…

Q: A research institute asked students if they felt vulnerable to identity theft. In the poll, n=1047,…

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Q: In a survey of 2000 adults in a recent year, 713 made a New Year's resolution to eat healthier.…

A: We have given that  Sample size n= 2000 Favorable cases x = 713 Sample proportion p^=x/n