If n=31, ¯xx¯(x-bar)=38, and s=16, construct a confidence interval at a 98% confidence level. Assume the data came from a normally distributed population. Give your answers to one decimal place.  _______ < μ <  _______

Q: You measure 39 turtles' weights, and find they have a mean weight of 34 ounces. Assume the…

A: we have to find given ci.

Q: If n=19, x(x-bar)=32, and s=3, construct a confidence interval at a 90% confidence level. Assume the…

A: Mean = 32 Standard deviation = 3 Sample size = 19

Q: ample of 1100 observations taken from a population produced a sample proportion of 0.30. Make a 90%…

A: Confidence interval: It is defined as the range which contains the value of true population…

Q: If x̄=106​, σ=20​, and n=35​, construct a 99​% confidence interval estimate of the population​ mean,…

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Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

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Q: % confidence level. Assume the data came from a normally distributed population. Give your answers…

A: Sample Mean, x̄ = 35.0 sample standard deviation, s = 10.0 Sample Size, n = 24 confidence level, c=…

Q: If X=127​, σ=26​, and n=38​, construct a 95​% confidence interval estimate of the population​ mean,…

A: The random variable X follows normal distribution. The sample mean is 127. The population standard…

Q: You will be applying what you have learned in this course by gathering data and running a…

A: C) Here X¯=66.78 and σ=4.5 C.I. = X¯±z×12σn C.I. = 66.78 ± 1.96 ×4.59 C.I. = 66.78 ± 2.94  C.I. =…

Q: If n=61n=61, ¯xx¯=36, and s=4s=4, construct a confidence interval at a 99% confidence level. Give…

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Q: Wall thickness of 25 glass 2-liter bottles was measured by a quality-control engineer. The sample…

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Q: You measure 42 textbooks' weights, and find they have a mean weight of 66 ounces. Assume the…

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Q: If n = 22, ¯xx¯ = 30, and s = 9, construct a confidence interval at a 98% confidence level. Assume…

A: According to the provided information, n  = 22,  ¯x = 30 s = 9 degrees of freedom = n-1 = 22-1 = 21…

Q: If the variance of the water temperature in a lake is 29°, how many days should the researcher…

A: Solution: From the given information, confidence level is 0.95, σ2=29 and E=4.

Q: you want to obtain a sample to estimate a population mean. based on previous evidence, you believe…

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Q: Express the confidence interval (19.6%,28.2%)in the form of ˆp±ME.

A: The given confidence interval is (19.6%,28.2%).

Q: If n = 570 and X = 456, construct a 90% confidence interval for the population proportion, p.Give…

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Q: You measure 32 dogs' weights, and find they have a mean weight of 78 ounces. Assume the population…

A: Given,sample size(n)=32sample mean(x)=78standard deviation (σ)=3.4α=1-0.99=0.01α2=0.005Z0.005 =2.58

Q: Express the confidence interval 77.7% ± 6.8% in interval form. ___________________________ Express…

A: It is given that, the confidence interval is in the form of proportion and margin of error. The…

Q: In a sample of 200 individuals, 115 indicated they are Catholic. Develop a 95% confidence interval…

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Q: If n=12, ¯xx¯(x-bar)=35, and s=8, construct a confidence interval at a 90% confidence level. Assume…

A: Given problem Given that   n = 12 x-bar = 35 s = 8 Construct a confidence interval at a 90%…

Q: You intend to estimate a population mean with a confidence interval. You believe the population to…

A: From the provided information, Sample size (n) = 15 Confidence level = 85% Level of significance (α)…

Q: If n=22, ¯xx¯(x-bar)=38, and s=13, construct a confidence interval at a 80% confidence level. Assume…

A: The data provided is- x-bar = sample mean = m = 38 s = standard deviation = 13 n = sample mean = 22…

Q: confidence interval at a 95% confidence level. Assume the data came from a normally distributed…

A: Given that  n = 20 , s = 6

Q: Lengths of pregnancies are normally distributed with a mean of 271 days and a standard deviation of…

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Q: Find the critical value zα/2that corresponds to the given confidence level.   86​%…

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Q: The distribution of packages sent by REI have weights that Normally distributed. The packages have…

A: Given that the distribution of packages sent by REI have weights that are Normally distributed. The…

Q: Assume that population means are to be estimated from the samples described. Use the sample results…

A: Given that, Mean = 77 Standard deviation = 8 Sample size = 144 95% confidence level

Q: The t-statistic is computed as follows:   The p-value for t = 2.062 and 16 df is 0.0279 (from the…

A: Given information- Value of t-statistics = 2.062 Degree of freedom, df = 16 We have to find the…

Q: If n=29, x¯(x-bar)=35, and s=12, construct a confidence interval at a 95% confidence level. Assume…

A: n = 29x¯ = 35s = 12

Q: If n = 19, ¯xx¯ = 34, and s = 20, construct a confidence interval at a 95% confidence level. Assume…

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Q: You measure the weights of 47 watermelons and find they have a mean weight of 77 ounces.  Assume the…

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Q: If n=28, ¯xx¯(x-bar)=48, and s=13, construct a confidence interval at a 99% confidence level. Assume…

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Q: You are performing a left-tailed matched-pairs test with 35 pairs of data. If a = .01, find the…

A: n = 35 Degree of freedom = 34 alpha = 0.01 Tail = One-tail

Q: If a school district takes a random sample of 61 Math SAT scores and finds that the average is 425,…

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Q: If n = 15, ¯xx¯ = 42, and s = 18, construct a confidence interval at a 80% confidence level. Assume…

A: The sample size is, The sample mean is, The sample standard deviation is, The level of confidence…

Q: xpress the confidence interval (65.2%,83.2%) in the form of ˆp ± ME. _____% ± _____ %

A: The confidence interval is (65.2%, 83.2%).

Q: A sample of 3000 observations has a mean of 80 and a standard deviation of 10. The distribution is…

A: Given Data: x¯=80s=10   The empirical rule is also known as 68-95-99.7 rule According to the…

Q: The population of weights of Calculus textbooks is normally distributed with a population mean…

A: We have given that  X~N( mu ,sigma^2)  mu= 2.46 , sigma =0.53  Z-socre = ( x - mu) / sigma

Q: If n = 20, ¯xx¯ = 47, and s = 10, construct a confidence interval at a 80% confidence level. Assume…

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Q: distribution of scores on a standardized test is approximately Normal with standard deviation of σ =…

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Q: Assume that a sample is used to estimate a population mean μμ. Find the 90% confidence interval for…

A: The mean is 52.8 and the standard deviation is 20.3.