If Xbar=81​,S=20​,and n=36​,and assuming that the population is normally​ distributed, construct a 90% confidence interval estimate of the population​ mean,

Q: When the standard deviation used to construct a confidence interval for a population mean increases,…

A: Given data: When the standard deviation used to construct a confidence interval for a population…

Q: Using a t-table or a t-score calculator, find the value of t for sample size (n) of 25 to estimate…

A: Sample size n=25

Q: If a 92% Confidence Interval for the Population Mean is (67.8, 78.9), find its Margin of Error.

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Q: Construct a confidence interval for the mean of the paired differences for the two populations with…

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Q: f. A sample of 60 Grade 10 students' ages was obtained to estimate the mean of all Grade 9 students.…

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Q: Construct the indicated confidence interval for the difference between population proportions p1 -…

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Q: In a random sample of eight ​people, the mean driving distance to work was 19.3 miles and the…

A: The question is about confidence interval Given : Randomly selected no. of people ( n ) = 8 Sample…

Q: Construct the confidence interval for the population mean y. C=0.95, x= 16.7, o= 4.0, and n= 75. A…

A: Here, C=0.95, x=16.7, σ=4.0, and n=75.

Q: We take a sample of 50 people and obtain a sample mean of 147 pounds with a standard deviation of 15…

A: We have given that  Sample size n = 50 Sample mean = 147 Standard deviation = 15 90%confidence…

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: Suppose you use simple random sampling to select and measure 47 dogs' weights, and find they have a…

A: Given, mean is 78 and standard deviation is 13.5. Sample number is 47. We with use one sample z…

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: me that you have administered a worker satisfaction test to a random sample of 25 workers at your…

A: As the value of population standard deviation is known, we will use z-distribution. Given: Sample…

Q: if E=0.07 and population standard deviation=0.8 then find the sample size for 99% confidence…

A: Margin of error(E)=0.07 population standard deviation(σ)=0.8 confidence level=99%

Q: Assuming that the population is normally distributed, construct a 95% confidence interval estimate…

A: The question is about confidence intervalGiven :To find :1 ) 95 % CI estimate for the popl. mean…

Q: Find a 95% confidence interval for a population mean u for these values: d. n=28, x= 24.5, s=7.05 e.…

A: (d) Obtain the 95% confidence interval for the population mean. The 95% confidence interval for the…

Q: (ii) Let (a, b) be the 95 confidence interval for the population mean u. Find the values of a and b.

A: Givenstandard deviation(σ)=1sample size(n)=16Mean(x)=7.3

Q: the following sample was taken from a normally distributed population: 20,27,15,2016,22 and 13. A…

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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: Calculate a 95% upper confidence bound for the mean of a normally distributed population using the…

A: Given that, x = 32289  s = 2846  n=15  For 95% confidence interval,the z value is 1.96

Q: Find the critical value, t c,  used for a 95% confidence interval for the mean with a sample size of…

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Q: Construct the indicated confidence interval for the difference between population proportions p1-p2.…

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Q: When planning to construct a 95% confidence interval for a population mean such that it is within…

A: Given data, E=1/8=0.125 Let p=0.5 z-value at 95% confidence is Zc=1.96 n=?

Q: Calculate the lower endpoint of a two-sided 95% confidence interval for the population mean using…

A: given data sample size (n) = 32sample mean ( x¯ ) = 0.485sample standard deviatio (s) = 0.36995% ci…

Q: Suppose a sample of 30 LCC students are given an IQ test. The sample has a standard deviation of…

A: Given the following information- n=30s=12.24s2=149.82

Q: A random sample of high school students is used to estimate the mean time all high school students…

A: Solution: From the given information, a 99% confidence interval is 1.7 hours to 3.1 hours.

Q: A business school placement director wants to estimate the mean annual salaries 5 years after…

A: Given: Sample size (n) = 25 Sample mean x¯ = 42740     Sample standard deviation (s) = 4780…

Q: Construct the confidence interval for the population mean  c=0.95, x=8.7 standard deviation=0.8 and…

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Q: Assume that a sample is being used to estimate a population mean μμ. If n = 29, x¯ = 46, and s =…

A: From the provided information, Sample size (n) = 29 Sample mean (x̅) = 46 Sample standard deviation…

Q: The ICU Admission dataset includes a variable indicating the age of the patient. Find and interpret…

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Q: A sample of 30 beams has an average strength of 1908.8 lbs. and s = 327.1. what is the 95%…

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Q: A sample of 500 observations is taken from a normally distributed population with a mean of 100 and…

A: A sample of 500 observations was taken from a normally distributed population.the standard deviation…

Q: The revenues of a sample of 15 spaza shops were recorded for the period  of March 2020.  The…

A: Given information: n=15   sample variance ( s2 ) =897 level of significance ( α )=0.01    99%…

Q: Assume that a sample is being used to estimate a population mean μμ. If n = 19, x¯ = 43, and s = 3,…

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Q: Assume that a sample is used to estimate a population proportion p. To find the 95% confidence…

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Q: Construct a confidence interval for the mean of the paired differences for the two populations with…

A: Given,n=38d¯=2.191sd=0.411degrees of freedom(df)=n-1df=37-1=36α=0.1α2=0.05t0.05(36)=1.688     (from…

Q: For the sample data set: (0,0) (2,3) (3,3) (6,4) (9,8) a. Give a point estimate for the mean value…

A: The given data set is (0, 0), (2, 3), (3, 3), (6, 4), and (9, 8).

Q: Forty-two items are randomly selected from a population of 500 items. The sample mean is 40 and the…

A: Given : Population size (N) = 500 Sample size (n) = 42 Sample Mean (μ) = 40 Sample standard…

Q: f. A sample of 60 Grade 10 students' ages was obtained to estimate the mean lot all Grade 9…

A: