A 90% confidence interval for the mean μ of a population is computed from a random sample and is found to be 9.00 ± 3.00. The sample is very large, so you can assume that the population standard deviation (o) is known. Which of the following could be the 95% confidence interval based on the same data?

Q: A random sample of size n1=25, taken from a normal population with a standard deviation σ1=5, has a…

A: Givensample size(n1)=25standard deviation(σ1)=5Mean(x1)=80sample size(n2)=36standard…

Q: A simple random sample of size n is drawn from a population that is normally distributed. The…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: When constructing a confidence interval for μwhen σis known, we assume that we have a simple random…

A: The standard deviation measures the distance between each data point and the mean. It measures the…

Q: A random sample of size n = 30, taken from a large population with a standard deviation σ = 5, has a…

A: Given data A random sample of size n=30 taken from a large population with standard deviation 5 and…

Q: Suppose that the waiting times for patients at a local hospital are normally distributed with a…

A: Following information is given: standard deviation = 30 minutes sample size = 75

Q: What critical value t* from Table C should be used for a confidence interval for the mean of the…

A: Givena)confidence interval is =80%The level of significance is α=1-0.80=0.20The sample size n=9The…

Q: A student was asked to find a 95% confidence interval for the population proportion of students who…

A: The 95% confidence interval for the population proportion of students who take notes is 0.11 < p…

Q: 95% confidence interval for a proportion has a lower bound of 0.30 and a margin of error of 0.05. 1.…

A:

Q: A random sample of 36 is selected from a normally distributed population and provides a sample mean…

A: Given that Sample size n = 36 Sample mean = 23.9  sample SD s = 6.9 The critical value of t at (n -…

Q: A simple random sample of 50 has been collected from a population for which it is known that s =…

A: It is given that sample mean is 230.0 and the standard deviation is 10.0.

Q: Suppose a random sample of 230 tractors has a mean weight of 15,000 lbs with a sample standard…

A: Given data: Sample size = 230 Sample mean = 15000 lbs Sample standard deviation = 1100 lbs…

Q: The t distribution is used to make a confidence interval for the population mean if the population…

A:

Q: Suppose that the waiting times for patients at a local hospital are normally distributed with a…

A: solutionGiven the waiting time forpatients at a local hospital arenormally distributedPopulation…

Q: When the population standard deviation is unknown and the sample size is less than 30, what table…

A: the population standard deviation is unknown and the sample size is less than 30

Q: 8. A sample of 16 gas stations shows that the mean price for regular gasoline is x= $3.25. It is…

A:

Q: A simple random sample of n-15 is drawn from a population that is normally distributed. The sample…

A:

Q: A simple random sample of size n is drawn. The sample​ mean, x​,is found to be 17.7​, and the sample…

A: We have to construct ci from given data.

Q: random sample of nn measurements was selected from a population with standard deviation σ=11.4 and…

A:

Q: For a confidence interval of 5.4 +/- 0.2 find the % confidence level if the standard deviation is…

A:

Q: A random sample of size n1=22​, taken from a normal population with a standard deviation σ1=6​, has…

A: From the provided information,

Q: A simple random sample of size n is drawn. The sample​ mean, x​,is found to be 17.7​, and the sample…

A:

Q: Let us give a 95% confidence interval estimate for the population mean. If the sample mean is 1000…

A: Given Data: Sample mean(x¯)=1000 Standard error(SE)=50   Confidence Level=95%

Q: 1. A simple random sample of size 50 is drawn from a population that has a standard deviation of 24.…

A: We can determine the margin of error, E, E=zα/2×σn For a 95% confidence interval,…

Q: 1. A simple random sample of 400 individuals provides 100 yes responses. Compute the 90%, 95%, and…

A:

Q: The width of a confidence interval is influenced by all of the following except_________. Select…

A: Width of the confidence interval is 2×Margin of error Where,  Margin of error (E): E=critical…

Q: Which of the following is not a condition for constructing a confidence interval to estimate the…

A: A condition interval to estimate the difference between two population proportion is as follow:

Q: Estimate the population mean by finding a 90% confidence interval given a sample of size 514, with a…

A: Given : Sample Size, n = 514 Sample Mean, x̄ = 38.8 sample standard…

Q: A simple random sample with n= 52 provided a sample mean of 23.0 and a sample standard deviation of…

A: It is given that Sample size n = 52 Sample mean M = 23.0 Sample SD s = 4.7 The critical value of t…

Q: A random sample of n measurements was selected from a population with unkown mean μ and standard…

A: Note: Please repost part d ,e as i can answer only first 3 subparts as per my policy.

Q: A sample of size n=15 has sample mean "x"=2.1 and sample standard deviation s=1.7. A. Construct a…

A: Given Datan = 15mean µ = 2.1sample standard deviation, s = 1.7 A)95% confidence interval for the…

Q: A researcher chooses a simple random sample of 100 Lexington, Kentucky, residents and finds that 20…

A:

Q: 4. The mean and standard deviation of n measurements randomly sampled from a normally distributed…

A:

Q: A simple random sample of size n is drawn from a population that is normally distributed. The sample…

A: From the provided information, Sample mean (x̄) = 114 Standard deviation (s) = 10

Q: A random sample of nn measurements was selected from a population with standard deviation σ=10.4 and…

A: Solution To find the confidence interval we will use z distribution

Q: You are trying to estimate the population mean p after taking a random sample from that population.…

A:

Q: In testing the hypotheses, Ho: H1 = P2 Vs. Ha: H1# H2 samples of size 9 are taken from each of the…

A:

Q: A random sample of 10 items is taken from a normal population. The sample had a mean of 82 and a…

A:

Q: A population has standard deviation ? = 21.3. a. How large a sample must be drawn so that a 99%…

A: Solution: The following terms and their values are given to us: Population standard deviation: σ =…

Q: Create a 85% confidence interval for a population mean from a sample of size 65 with sample mean x =…

A:

Q: A researcher wants to construct a 99% confidence interval to estimate the true mean age of the…

A: The confidence level is 0.99. The level of significance is 1-0.99=0.01.

Q: A simple random sample of 19 models’ runnaway is obtained, providing a standard deviation of 11.19.…

A: Here s= 11.19 So s2= 125.2161 n=19 90%ci for population sd.

Q: Suppose we have a population that is approximately normal with standard deviation a=2.4 If we want…

A:

Q: What critical value t∗t∗ from Table C would you use for a confidence interval for the mean of the…

A: We have to find critical value..

Q: For a given confidence level and sample size, which of the following is true in the interval…

A: The confidence interval for mean is given as  X-Zα2σn≤μ≤X+Zα2σn

Q: 2. A random sample of 10 items is taken from a normal population. The sample had a mean of 82 and a…

A: The formula for the confidence interval for population mean is : C.I=x±zα/2.σn, but when the…

Q: A simple random sample with n = 52 provided a sample mean of 23.5 and a sample standard deviation of…

A: a. The given sample size is 52, sample mean is 23.5, and sample standard deviation is 4.1. The…

Q: If n-10, 2(xbar)-40, and s-4, construct a confidence interval at a 98% confidence tevel. Assume the…

A: The summary of statistics is, x¯=40,s=4,n=10 The degree of freedom is, df=n-1   =10-1   =9 Critical…

Q: A simple random sample of size n=51 is taken from a normally distributed original population. The…

A: (1-α)% CI for σ is(n-1)s2χ2α/2,n-1≤σ≤(n-1)s2χ21-α/2,n-1

Q: A random sample of 130 observations produced a mean of T = 23.5 and a standard deviations = 2.16.…

A: Given:   Sample size  n          =  130       mean  x¯               =  23.5 Standard deviation s  =…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.