A random sample of size 12 is selected from Normal distribution with mean 18 and unknown variance. If the sample standard deviation S is 5, then the (90.)th percentile of the sample mean is closest to:

Q: The mean tar content of a simple random sample of 25 unfiltered king-size cigarettes is 21.6 mg,…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

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: A random variable X is normally distributed with a mean of 175 and a standard deviation of 25. Given…

A:

Q: Suppose lengths in inches, of adult corn snakes have unkown distribution with mean 62 and standard…

A: Given: Mean of the distribution, μ=62     & standard deviation of the distribution, σ=7…

Q: A random sample of 10 subjects have weights with a standard deviation of 11.7640 kg. What is the…

A: Given  A random sample of 10 subjects have weights with a standard deviation of 11.7640 kg.

Q: For random samples of size n- 25 selected from a normal distribution with a mean of u- 50 and a…

A: Define the Random Variable, Xi : Value of the i th random variable mean, µ = 50, standard deviation…

Q: If x represents a random variable with mean 118 and standard deviation 35, then the standard…

A: According to the given information, we have Mean = 118 Standard deviation = 35 Sample size = 49

Q: Suppose that average male weight in the US is 175 pounds with a standard deviation of 25 pounds.…

A: It is given that population mean µ=175 pounds, population standard deviation σ=25 pounds. Sample…

Q: Suppose x has a distribution with a mean of 13.9 and a standard deviation of 2.1. Random samples of…

A: The mean is 13.9 and the standard deviation is 2.1, and the sample size is 49.

Q: A random sample of 10 subjects have weights with a standard deviation of 12.0643 kg. What is the…

A: n = 10 s = 12.0643 kg.

Q: Suppose x has a normal distribution with a population standard deviation of 2.2. If a random sample…

A:

Q: If x represents a random variable with mean 110 and standard deviation 14, then the standard…

A: If x represents a random variable with mean 110 and standard deviation 14. μ=110σ=14 sample…

Q: The diameter of a pipe is normally distributed, with a mean of 0.3 inch and a variance of 0.0016.…

A: Let us denote X=The diameter of a pipeGiven that X follows a normal distribution with mean=0.3 and…

Q: The mean and standard deviation of the tax value of all vehicles registered in NCR are u=550,000 and…

A:

Q: If x represents a random variable with mean 125 and standard deviation 20, then the standard…

A:

Q: The annual per capita consumption of canned fruit by people in the U.S. is normally distributed,…

A: Sampling distribution of x¯ : If simple random sample of size n is drawn from Normal population with…

Q: If a student computes the standard deviation that was due to the analysis error from a homogenous…

A: Given SD from homogenous sample = 0.04 SD from heterogeneous sample = 0.05

Q: Suppose that the economic growth of a country is normally distributed with mean μ = 8 ppt, and…

A: Given : Economic growth of a country is normally distributed with mean μ = 8  and standard deviation…

Q: Suppose that the average number of hurricanes heading to RGV is 32 per year witha standard deviation…

A: It is given that the, Hurricanes heading follows the normal distribution with the average number of…

Q: If x represents a random variable with mean 137 and standard deviation 35, then the standard…

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

Q: If X is a normal random variable with a standard deviation of 10, then 3X has a standard deviation…

A: Given: X is a normal random variable with standard deviation equals to 10.

Q: Assume the random variable X is normally distributed with a mean of 50 and a standard deviation of…

A:

Q: A random sample of 36 values is drawn from a mound-shaped and symmetric distribution. The sample…

A: Disclaimer: Since you have posted a question with multiple sub-parts, we will solve the first three…

Q: The mean and standard deviation of the tax value of all cars registered in the Osaka, Japan are…

A:

Q: The average length of a trout caught from a certain lake is 10.4 inches, with a standard deviation…

A: Given that the population mean= 10.4 inches and standard deviation of 1.5 inches

Q: A random sample of size n= 16 was drawn from a population. If it is known that the population has…

A: Given : Mean = 32 Sample size =n = 16 Standard deviation = 5

Q: Assume the random variable X is normally distributed with mean μ=50 and standard deviation σ=7.…

A: It is given that, the random variable X is normally distributed with mean μ=50 and standard…

Q: The masses of 1500 ball bearings are normally distributed, with a mean of 22.40 g and a standard…

A:

Q: Draw á random sample of size 5 from a normal population with mean zero and standard deviation unity.

A:

Q: A random sample of size 36 drawn from the population of a known mean of 50 and standard deviation of…

A:

Q: The monthly rents for studio apartments in a certain city have a mean of $1,020 and a standard…

A: Given that  The monthly rents for studio appo1intments in certain city has a mean $1,020 Mean (μ) =…

Q: Random samples of size 25 are taken from an infinite population whose mean is 160 and standard…

A:

Q: Consider a normally distributed population of scores with a mean μ = 100 and σx = 10. What score has…

A:

Q: The diameter of a pipe is normally distributed, with a mean of 0.8 inch and a variance of 0.0025.…

A: GivenMean(μ)=0.8Variance(σ2)=0.0025standard deviation(σ)=0.05

Q: In an exam attended by 6000 people, the average of the grades is 60 and the standard deviation is…

A: It is given that the, In an exam attend by 6000 people, the average grade is 60 and the standard…

Q: A Random Sample Of Size 25 Is To Be Selected From A Normal Population Having A Mean Of 81 And A…

A: Given that Population mean=81 Variance =9

Q: Suppose that chemistry exam scores are normally distributed with a mean of 24 and a standard…

A: Let X denote exam scores. Given that X follows N(mean = 24, SD = 4)

Q: A sample of size 400 is taken from a population whose standard deviation is 16. Find the standard…

A:

Q: Suppose a random sample of size 1000 is selected from a large population where the population mean…

A: Obtain the standard error of the mean of the sampling distribution. The standard error of the mean…

Q: Suppose the body mass index (BMI) of a group of athletes has a population mean of 24.98 and a…

A: # Given random sample of size n=150 and population mean mu=24.98  and standard deviations=4.18  To…

Q: A random sample of 10 subjects have weights with a standard deviation of 10.5816 kg. What is the…

A: Here,we have 10 subjects with measurements from weights having standard deviation,sd=10.5816 kg. We…

Q: A company produces light bulbs whose life follows a normal distribution, with mean (1300+R) hours…

A: Find the lifetime in hours that R% of the bulbs exceed: Denote the lifetimes of bulbs in hours by…

Q: A sample of size 50 will be drawn from a population with mean 76 and standard deviation 14. Find the…

A:

Q: If x represents a random variable with mean 137 and standard deviation 16, then the standard…

A: Let X be the random variable. It is given that X is normally distributed with mean 137 and standard…

Q: "suppose that a random sample of size 20 is taken from a normal distribution with unknown variance…

A: Given: n=20 μ=Unknownx=10σ2=1Andμ(Posterior)=15σ(Posterior)=0.1

Q: The mean tar content of a simple random sample of 25 unfiltered king-size cigarettes is 21.4 mg,…

A: The following information has been provided: Sample Mean 1 (Xˉ1)(\bar X_1) = Unfiltered King…

Q: The capacitances of certain electronic components have a normal distribution with a mean μ = 175 and…

A: Given: Electronic components have a normal distribution with μ=175, σ=2.5 Sample size, n=10

Q: The diameter of a pipe is normally distributed, with a mean of 0.4 inch and a variance of 0.0025.…

A: Given,mean(μ)=0.4standard deviation(σ)=0.0025

Q: Suppose x has a distribution with a mean of 50 and a standard deviation of 36. Random samples of…

A: Solution: From the given information, X has a mean µ=50 and a standard deviation σ=36. The sample…

Q: A random variable is normally distributed with the mean of $1500.00 and standard deviation of $40.…

A: Given,sample size(n)=25mean(μ)=1500standard deviation(σ)=40