If n=12, x=38, and s=18, construct a confidence interval at a 80% confidence level. Assume the data came from a normally distributed population. Give your answers to one decimal place. Can we conclude that the population mean is at least 32.42? Can we conclude that the population mean is no more than 47.08?

Q: If n = 20, a = 48, and s = 8, construct a confidence interval %3D at a 80% confidence level. Assume…

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Q: e: For each confidence interval, enter your answer in the form (LCL, UCL). You must include the…

A: Sample size n =47 Sample mean=109 Population standard deviation =32

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 n=18, (x-bar)=42, and s=17, construct a confidence interval at a 80% confidence level. Assune the…

A: We have given that,  Sample mean (x̄) = 42, standard deviation (s) = 17 and sample size (n) = 18…

Q: If n = 10, ¯xx¯ = 43, and s = 8, construct a confidence interval at a 90% confidence level. Assume…

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

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

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Q: A. Estimate the population mean with 95% confidence. Confidence Interval = B. Estimate the…

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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: Suppose we are interested to construct a confidence interval of the mean exam score. A random sample…

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Q: a 95% confidence interval estimate for population mean is determined to be 75.38 to 86.52. if the…

A: We have  to find the confidence level is reduced to 90%, the confidence interval will....

Q: If n=14, (x-bar)=37, and s=7, construct a confidence interval at a 98% confidence level. Assume the…

A: Given,n=14x¯=37s=7degrees of freedom(df)=n-1df=14-1=13α=1-0.98=0.02α2=0.01t0.01(13)=2.650     (from…

Q: statistics practitioner took a random sample of 41 observations from a population whose standard…

A: Formula :

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: A statistics practitioner took a random sample of 43 observations from a population whose standard…

A: It is given that, Sample mean = 101. Population standard deviation, sigma is 20. The sample size, n…

Q: If n=380 and X = 304, construct a 90% confidence interval. Give your answers to three decimals…

A: Given,n=380 ,x=304p^=xnp^=304380=0.81-p^=1-0.8=0.2α=1-0.90=0.1α2=0.05Z0.05=1.645     (from Z-table)

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

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Q: A statistics practitioner took a random sample of 45 observations from a population whose standard…

A: Confidence interval is a part of interval estimation, which is used to estimate the unknown value of…

Q: If n-28, 2(x-bar)-38, and s-13, construct a confidence interval at a 98% confidence level. Assume…

A: Given : Sample Size, n = 28 Sample Mean, x̄ = 38 sample standard…

Q: A statistics practitioner took a random sample of 56 observations from a population whose standard…

A: We have given that,  Sample size (n) = 56, population standard deviation (σ) = 35 and sample mean…

Q: If n=17, (x-bar)-45, and o =12, construct a confidence interval at a 80% confidence level. Assume…

A: Given X-bar=45 S=12 n=17

Q: If n=15, ¯xx¯=43, and s=11, construct a confidence interval at a 90% confidence level. Assume the…

A: Confidence interval is used to estimate the range of values within which the unknown parameters of…

Q: A statistics practitioner took a random sample of 48 observations from a population whose standard…

A: sample size(n)=48 population standard deviation(σ)=25 Mean(x)=105

Q: If n=27, x=48, and s-6, construct a confidence interval at a 80% confidence level. Assume the data…

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Q: Assume that population mean is to be estimated from the sample described. Use the sample results to…

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Q: A statistics practitioner took a random sample of 43 Note: For each confidence interval, enter your…

A: n = 43 standard deviation = 27 mean = 104 95% confidence interval for mean is given by  x±zα2*σn 104…

Q: A statistics practitioner took a random sample of 55 observations from a population whose standard…

A: It is given that, Sample mean = 104. Population standard deviation, sigma is 31. The sample size, n…

Q: atistics practitioner took a random sample of 49 observations from a population whose standard…

A: Sample size n =49 Sample mean=103 Population standard deviation =25

Q: If n = 5, T-46, and s= 13, construct a confidence interval at a 80% confidence level. Give your…

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Q: If n=19, ¯xx¯=40, and s=7, construct a confidence interval at a 99% confidence level. Assume the…

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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 = 180 and X = 144, construct a 99% confidence interval for the population proportion, p. Give…

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Q: If n=28, (x-bar)=45, and s-8, construct a confidence interval at a 99% confidence level. Assume the…

A: Given that.  Sample size n =28 Sample mean=45 Standard deviation =8

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

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Q: If n = 18, = 44, and s= 3, construct a confidence interval at a 98% confidence level. Assume the…

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Q: If n = 81, -45, and s to one decimal place. = 8, construct a confidence interval at a 90% confidence…

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Q: Mark each statement TRUE or FALSE. For these problems, assume that to estimate average time spent…

A: It is given that the sample size is 10.

Q: A statistics practitioner took a random sample of 60 observations from a population whose standard…

A: Sample size, Population standard deiation, Sample mean,

Q: A statistics practitioner took a random sample of 57 observations from a population whose standard…

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Q: If n=28, ¯x(x-bar)=32, and s=11, construct a confidence interval at a 95% confidence level. Assume…

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Q: A statistics practitioner took a random sample of 47 observations from a population whose standard…

A: Given that  Sample size n =47 Sample mean =97 Population standard deviation =32

Q: If n=30, (x-bar)=45, and s=13, construct a confidence interval at a 95% confidence level. Assume the…

A: We have given that,  Sample mean (x̄) = 45, sample size (n) = 30 and standard deviation (s) = 13…

Q: A statistics practitioner took a random sample of 59 observations from a population whose standard…

A: sample size(n)=59 Population standard deviation(σ)=32 Mean(x)=95

Q: If n = 220, p-hat = 0.4, then what will be the 90% Confidence Interval for the population…

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