Samples of sizen = 9 are selected from a normal population withp = 80 with o = 18. What is the expected value for the mean of the distribution of sample means? O HM = 6 O UM = 18 O HM = 80/3 %3D O UM = 80

Q: Find a 95% confidence interval for the sample mean of Y = X̄12 + X̄22 when X̄'s are obtained from…

A: Given X¯'s are obtained from standard normal population.

Q: The life expectancy of a fluorescent tube is normally distributed with a mean of 6,050 hou and a…

A: As per given by question, find a probability that a tube lasts for more than 6850 hours when the…

Q: A sample is selected from a population with a mean of 65, and a standard deviation of 15. If the…

A: The expectation and standard deviation of the sampling distribution of the sample mean are as…

Q: The lifespan of a certain brand of an electric motor is normally distributed with a mean value of 10…

A: Using standardization of Normal distribution and compare the value with Standard Normal value.

Q: A sample of 25 observations is taken from an infinite population with a mean of 45 and a standard…

A: Concept of sampling distribution of sample mean: Let a particular characteristic of a population is…

Q: Suppose that the time it takes a student to complete an exam is a random variable that has normal…

A: Introduction: Denote the random variable, Denote X as the time taken by a randomly selected student…

Q: Eggs laid by a particular chicken are known to have lengths normally distributed, with mean 6 cm and…

A:

Q: The scores of students on the SAT college entrance examinations at a certain high school had a…

A: Note: Thank you for the question. Since, the sample size is not specified, we are calculating the…

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: A sample is selected from a population with a mean of μμ=65 and a standard deviation of σσ=15 . If…

A: For n=9 Expected value of M Standard error of M for n=9

Q: The results of a statistics examination follow an approximate normal distribution with a mean of 68…

A: Given Data Population Mean,μ = 68.0 Population Standard Deviation,σ = √64 =  8.0

Q: The height of students is a random variable with a normal distribution with mean = 168:5cm and…

A: We have to find the probability that a randomly chosen student has a height of more than 180.4…

Q: The length of time need to service a motorcycle at ETS Service Station is normally distributed with…

A: Given, Let X be length of time need to service a motorcycle at ETS Service Station…

Q: A simple random sample from a population with a normal distribution of 106 body temperatures has…

A: Given that, A simple random sample from a population with a normal distribution of 106 body…

Q: If systolic blood pressure (SBP) in the population is normally distributed with mean = 120 mm Hg and…

A: X~N(μ,σ)μ=120σ=15

Q: Glucose levels in patiebts free of diabetes are assumed to follow a normal distribution with a mean…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ  are the mean…

Q: If bolt thread length is normally distributed, what is the probability that the thread length of a…

A:

Q: A sample is selected from a population with a mean of 65 and a standard deviation of 15. If the…

A: It is given that:

Q: A simple random sample from a population with a normal distribution of 103 body temperatures has x̄…

A: From the provided information, Sample size (n) = 103 Sample mean (x̅) = 98.70o F Sample standard…

Q: A sample of size 75 will be drawn from a population with mean 10 and standard deviation 12.  A.)…

A:

Q: A random sample of size n1=25 taken from normal population with standard deviation =5.2 has mean…

A: From the provided information,

Q: a machine producing vitamin E capsules operates so that the actual amount of vitamin E in each…

A:

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: The length of human pregnancies is approximately normally distributed with mean m=266 days and…

A:

Q: battery pack needs to be recharged about every four hours. A random sample of 50 battery packs is…

A: Given:  Sample size, n = 50 Sample mean,  = 4.05 hours Standard deviation,  = 0.2 hours

Q: A/A batch of 2500 resistors is normally distributed, with a mean resistance of 1.5 ohms and a…

A: Note:-Since you have asked multiple questions, we will solve the first question for you. If you want…

Q: Birth weights are distributed normally, with a mean of 3.39kg and a standard deviation of…

A: z-score for sample mean: z=x¯-μσn where,  x¯-sample meanμ-population meanσ-population standard…

Q: At one college, GPA's are normally distributed with a mean of 3 and a standard deviation of 0.6.…

A:

Q: The ARSMA test for mexican americans is normally distributed and has a mean of 3.0 and a standard…

A: The random variable X is defined as the ARSMA test score for Mexican Americans which follows normal…

Q: a machine producing vitamin E capsules operates so that the actual amount of vitamin E in each…

A: We have to find given probability....

Q: Given random samples Y1, Y2, · . ., Yn from exponential A distribution, we want to find a test of…

A: Y1,Y2,....Yn ~ Exponential (λ). This means, the PDF of Yi is; f(y) =λe-λx , x>00 , otherwise. The…

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: Samples of size n=9 are selected from a population with mean=80 with standard deviation=18. What is…

A: Population Mean:It is the overall average.Sample Mean:It is the average of all the observations in…

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: The price-earnings ratios for all companies whose shares are traded on the TSX followa normal…

A: Given: σ=4.8

Q: The drainage from a community during a storm is a normal random variable.  The estimated mean flow…

A: Given data, μ=1.7σ=0.25P(X≤1.9)=?

Q: The price (in SEK) for a certain share is described by a lognormally distributed random variable…

A:

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: Suppose the sediment density (g/cm) of a randomly selected specimen from a certain region is…

A:

Q: A sample is selected from a population with a mean of 65 and a standard deviation of15. If the…

A:

Q: A sample of size 15 will be drawn from a population with mean 125 and standard deviation 28.…

A: According to the provided information, the sample size is 15 will be drawn from a population with…

Q: The diameter of a pipe is normally distributed, with a mean of 0.7 inch and a variance of 0.0009.…

A:

Q: The average height of males in a certain town is 5.6 ft with standard deviation of 0.21. If 95% in…

A: We want to find P(X>a)=0.95 a= ?  P(x̄>5.8)= ? n=40

Q: A simple random sample from a population with a normal distribution of 97 body temperatures has…

A:

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

A:

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: a sample size of 5 will be drawn from a normal population with mean 60 and standard deviation 12. is…

A: Introduction:Expectation and standard deviation of X̅ in general:Suppose a random variable X has…

Q: The diameter of a pipe is normally distributed, with a mean of 0.6 inch and a variance of 0.0009.…

A:

Q: On average, weight of carry-on baggage of passengers on planes is 32.2 pounds. Assuming a standard…

A: Solution: Given information: n=40 Sample size μ=32.2 pounds Population mean σ=4.3 pounds Population…

Q: Find two values of the normal random variable with mean 88 and standard deviation 5 lying…

A: Standard deviation (σ) = 5 Middle 98% is given by First Finding the 1st percentiles Probability =…