Assume that a sample is used to estimate a population mean u. Find the 80% confidence interval for a sample of size 52 with a mean of 55.2 and a standard deviation of 9.1. Enter your answer as an open- interval (i.e., parentheses) accurate to 3 decimal places. 80% C.I. = The answer should be obtained without any preliminary rounding.

Q: The mean height for the population of a species of gorilla is believed to be 70 inches, and the…

A: Sample size n =20 Sample mean=73 Population standard deviation =4 NOTE:- According to bartleby…

Q: A simple random sample of 100 observations was taken from a large population. The population mean…

A: Solution: Given information: n= 100 Sample size  μ=50  Population mean σ= 5 Population standard…

Q: A population has a mean μ = 88 and a standard deviation a=7. Find the mean and standard deviation of…

A: The mean is 88 and the standard deviation is 7.

Q: An article the Journal of the American Medical Association (1992) examined whether the true mean…

A: From the provided information, Sample size (n) = 25 Sample mean (x̅) = 98.25oF Sample standard…

Q: Assume that a sample is used to estimate a population mean. Find the margin of error M.E that…

A: From the given information we find the margin of Error.

Q: ssume that a sample is used to estimate a population mean μμ. Find the 95% confidence interval for a…

A: It is given that the mean is 50.2 and the population standard deviation is 12.2.

Q: A simple random sample of 100 observations was taken from a large population (N > 10,000). The…

A:

Q: ssume that adults have IQ scores that are normally distributed with a mean of 100.6 and a standard…

A: Solution:Let X be the adults IQ score has normally distributed with mean  and standard deviation

Q: A population has a mean µ = 84 and a standard deviation o = 29. Find the mean and standard deviation…

A: Suppose the variable of interest is x. It is given that; x has mean µx = 84 and the standard…

Q: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

A:

Q: A population has a mean μ=73 and a standard deviation σ=9. Find the mean and standard deviation of a…

A:

Q: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

A:

Q: Assume that adults have IQ scores that are normally distributed with a mean of 98.7 and a standard…

A: Given data, μ=98.7σ=16.2P(X<x)=25%x=?

Q: A population has a mean μ = 71 and a standard deviation a=18. Find the mean and standard deviation…

A: List of formulae :  Mean of sampling distribution of the sample means :  μx¯ =μ Standard deviation…

Q: Assume that a sample is used to estimate a population mean u. Find the margin of error M.E. that…

A: Given information Sample size (n) = 10 Sample mean x̅ = 33.8 Standard deviation (s) = 13.8…

Q: Assume that adults have IQ scores that are normally distributed with a mean of 100.5 and a standard…

A: Solution: Let X be the adults IQ score has normally distributed with mean μ=100.5 and standard…

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 15 for the population…

A: Given that, Critical values: Using the z-table, the critical value at 90% confidence level for two…

Q: A population has a mean u 90 and a standard deviation a 18. Find the mean and standard deviation of…

A: The mean is 90 and the standard deviation is 18.

Q: You want to create a Z-interval for a population mean, using table C, with the following…

A: From the provided information, Sample size (n) = 25 Mean (x̅) = 34.2 Population standard deviation…

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

A: From the provided information, Sample size (n) = 36 Mean (x̅) = 75.5 Standard deviation (s) = 15.5…

Q: A population has a mean μ=79 and a standard deviation σ=18. Find the mean and standard deviation of…

A:

Q: A population has a mean u= 71 and a standard deviation a= 27. Find the mean and standard deviation…

A: Central Limit Theorem for mean: If a random sample of size n is taken from a population having mean…

Q: A simple random sample of 144 observations was taken from a large population. The sample mean and…

A: sample mean is given by, x = 120.8 and sample standard deviation is given by, s = 32.46 Number of…

Q: Assume that a sample is used to estimate a population mean μμ. Find the 99.5% confidence interval…

A: Since population is unknown, use t-distribution to find t-critical value. t-critical value: Refer…

Q: Assume that a sample is used to estimate a population mean μ. Find the margin of error M.E. that…

A: Given that n=13,x¯=33.2,s=8.5,confidence level=0.98.

Q: A population has a mean u = 81 and a standard deviation o 36. Find the mean and standard deviation…

A: Given that, A population has mean μ=81 and standard deviation σ=36. Sample size n=81

Q: A population has a mean μ=88 and a standard deviation σ=28. Find the mean and standard deviation of…

A: Given,   Mean = 88 Standard deviation = 28   The mean and standard deviation of a sampling…

Q: Find the 95% confidence interval for the population mean if the sample is × = 70.4 and the sample…

A: Given that  Sample size n= 24 Sample mean=70.4 Standard deviation =5

Q: A population has a mean u = 90 and a standard deviation o = 30. Find the mean and standard deviation…

A: We have given that the population has a mean 90 and  a standard deviation 30.

Q: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

A: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

Q: Assume the data set described is normally distributed with the given mean and standard deviation,…

A:

Q: A population has a mean μ = 70 and a standard deviation o=36. Find the mean and standard deviation…

A: Mean=70 Standard deviations=36 Sample size =81

Q: Assume that a sample is used to estimate a population mean μ. Find the margin of error M.E. that…

A: It is given that, Population standard deviation, sigma is 9.6. The sample size, n is 22. The…

Q: Suppose that the minimum and maximum ages for typical textbooks currently used in college courses…

A:

Q: Assume that a population has a mean of 14 with a standard deviation of 2. If a random sample of 49…

A:

Q: We want to obtain a sample to estimate a population mean. Based on previous evidence, researchers…

A: Population standard deviation(σ)=76.4 Margin of error(E)=0.5 confidence level=95%