se a simple random sample of size n = 36 is obtained from a population with µ = 105 = 16. What is the standard error of the sample mean? 67 286

Q: A normally distributed population with unknown variance has a mean of 20. If you took a random…

A: Given,  X is normally distributed with mean μ=20 and variance is unknown. A random sample of size…

Q: Suppose you could take all possible samples of size n = 25 from a Normal population with mean μ = 50…

A: Given that the sample size is n=25. That is less than 30. The mean and the standard deviation of the…

Q: Suppose a random sample of size 40 is selected from a population with ? = 12. Find the value of…

A: Given n=40 Standard deviation=12 N=400

Q: How many light bulbs must a company test to determine the mean number of hours that they will last?…

A: Given that, The company wants to be 90% confident that their mean is within 40 hours of the…

Q: A sample of n=16 is selected from a population = 100 and σ= 32. If the sample mean is 127, what is…

A: z-score for sample mean: From the given information,   n=16 µ=100 σ=32 x-bar=127   Therefore,

Q: For a certain process, the mean was shifted by 1.5 sigma from the target. What is the number of the…

A: Given Information: The mean was shifted by 1.5 sigma. A 4 sigma process produced 6000000 units.

Q: Suppose you could take all possible samples of size n = 25 from a Normal population with mean μ = 50…

A: Given that a sample of size n = 25 is drawn from a normal population with mean μ = 50 and σ = 5.

Q: n = 11 Ex=55 Ex²=2230 Give the value of the sample standard deviation.

A:

Q: A cigarette manufacturer claims that one-eighth of the US adult population smokes cigarettes. In a…

A: Given: P = 18 = 0.125 n = 100 X = 5 α = 0.05 Formula Used: Test-statistic Z = p-PP(1-P)n

Q: A sample of n = 7 scores has M = 5. All of the scores are doubled. What is the new mean?

A: For a set of observations of size n, the mean is defined as M = Σx/n.

Q: One sample has n = 4 scores with SS = 100 and a second sample has n = 8 with SS = 140. What is the…

A:

Q: A population has a mean and standard deviation of 45 and 9, respectively. A random sample of size 81…

A:

Q: Why do we divide by N-1 rather than by N when estimating a population standard deviation from the…

A: We have to find correct explanation for Why do we divide by N-1 rather than by N when estimating a…

Q: Suppose heights of dogs, in inches in a city have an unknown distribution with mean 26 and standard…

A: Given that heights of dogs in inches have a unknown distribution with mean 26 and standard deviation…

Q: A simple random sample of 100 students from a certain University was selected and count the…

A: n =100 Given sample proportion   P=0.3         formula for  standard error is SE  =  square root of…

Q: Which is true of the distribution of the sample mean?

A: Here given sample of size 20 is taken from a population with a normal distribution and unknown…

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

A:

Q: A random sample of size, n=20 has the mean 20 and standard deviation 5. What is the coefficeint of…

A: Given Information: Sample size (n) = 20 Sample mean (x¯) = 20 Sample standard deviation (s) = 5 To…

Q: If sp2 = 7.37, n1 = 6 and n2 = 6, what is the estimated standard error of the mean difference,…

A: Denote μ1, μ2 as the means of 1st population) and 2nd population, respectively.

Q: A population of scores has μ = 80. In this population, a score of X= 92 corresponds to z = 5. what…

A: Given: μ = 80 z = 5 X= 92

Q: A population has a standard deviation of σ = 18. On average, how much difference should exist…

A: Given data, σ = 18 n = 4   The standard error measures the distance expected on an average between…

Q: The president of a university wants to use the mean of a ma to estimate the average amount of time…

A: Given information Standard deviation σ = 1.40 Confidence interval = 0.99 Significance level(α) = 1-…

Q: A random sample of n=8 individuals is selected from a population with m=40 and a treatment is…

A: It is given that the sample size is 8 individuals with population mean is 40. The values of M is…

Q: A population has mean 7575 and standard deviation 1212. Random samples of size 121121 are taken.…

A:

Q: 20. Assume the population standard deviation is o = 25. Compute the standard error of the mean, O7,…

A:

Q: The random variable X has a normal distribution with a variance of 16 and an unknown mean. If the…

A: Given Data: X is a random variable   Variance (X)=16   X~ Normal (μ, 16) P(x>65)=0.025

Q: What are the mean and the standard deviation for the sampling distribution of the sample proportion?

A: Given that, Sample size (n) = 100 Population proportion (p) = 0.60 q = 1-p = 1-0.60 = 0.40 To find…

Q: A population has a mean of 75 and a standard deviation of 15. If you randomly sample 9 people from…

A: Mean = 75 Standard deviation = 15 Sample size = 9

Q: A population has a mean of 75 and a standard deviation of 15 you randomly sample nine people from…

A: Given population have mean 75 and standard deviation 15. A sample of 9 people from the population is…

Q: In a trivariate distribution, it is found that 113= 0.6, 123=0.5, 12 = 0.8. Find the value of 13.2.

A:

Q: tion, the standard distance between a sample mean and the population mean is 5 points for samples of…

A: The formula of standard error: SE=sn Now,  the standard distance between a sample mean and the…

Q: A sample of n = 64 scores is selected from a population with µ = 80 and with σ = 24. On average, how…

A: Given A sample of n = 64 scores is selected from a population with µ = 80 and with σ = 24. On…

Q: A population has a standard deviation of 18 on average how much difference should exist for a random…

A: From the provided information, Population standard deviation (σ) = 18 Sample size (n) = 36

Q: Of 1091 randomly selected cases of lung cancer, 801 resulted in death within 10 years. How large…

A: To Calculate: How large must the sample be ?

Q: when we sample from an infinite population, what happens to the standard error of the mean if the…

A: Given: Initial sample size = 1600 New sample size = 100

Q: all possible samples of size 100 from a very large population of values. The mean of the population…

A: given data,n=100μ=550σ=50

Q: If random samples, each with n = 16 scores, are selected from a normal population with µ = 100 and σ…

A: Here, the known values are n = 16 scores, µ = 100 and σ = 20.

Q: Suppose a variable x has population mean μ = 39.45 and standard deviation = 2.67. Determine the…

A: The sample size is 12 and the standard deviation is 2.67. That is, .

Q: A population has a standard deviation of 18 on average how much difference should exist for a random…

A: A population has a standard deviation of 18.

Q: a population of scores has u=44. in this population a score of x=40 corresponds to z = -1.00. What…

A: We have given that, Population mean (u) = 44, raw score of population (X) = 40 and z- score = -1. 00…

Q: A poll of 1068 adult Americans reveals that 48% of the voters surveyed prefer the Democractic…

A:

Q: random sample of size 36 is taken from a population with mean µ = 17 and standard deviation σ = 6.…

A: According to the given information in this question We need to find the mean and standard deviation…