For an initial investment of 100, an investment yields returns of Xi at the end of period i for i = 1,2, where X1 and X2 are independent normal random variables with mean 60 and variance 25. What is the probability the rate of return of this investment is greater than 10 percent?

Q: Steel produced by company A has an average tensile strength of 4500 lbs and a variance of 40000 lbs,…

A: Solution: Given information: nA= 50  Sample size of company A nB= 100 Sample size of company  B μA=…

Q: The usage time of a telephone belonging to a specific brand may be looked upon as a random variable…

A:

Q: A sample of 6400 cases is drawn at random from a large population. The Variance is 100. Calculate…

A: Sample size, n = 6400 Variance = 100 Standard deviation = VarianceStandard deviation = 100Standard…

Q: e standard deviation is larger than 110% of the population standard deviation. Correct your answer

A: A random sample is given as, n=22. The mean is , μ=300. The variance is, σ2=255. The probability…

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: The burning life (in hours) of electric lamps installed in a street of a city follows a normal…

A: Given: μ = 120 hours = 60×120 minutes=7200minutes σ2 = 54000 minutes.   Formula Used: Z-score = X-μσ…

Q: Show that X is a sufficient estimator of the mean u of a normal population with the known variance…

A: X~N(μ,σ2)

Q: Provide an example of a random variable with variance of 0

A: Given that We have provide example of random variable with variance of 0

Q: A sample of final exam scores is normally distributed with a mean equal to 20 and a variance equal…

A:

Q: An electrical firm manufactures light bulbs that have a length life with normal distribution, and…

A: Consider,

Q: What value is the probability that the mean of nine randomly selected individuals from a normally…

A: Sampling distribution of the sample mean x¯ ~ N(μx¯ , σx¯)

Q: Suppose that the number of customer that enter a bank in an hour is a Poisson random variable, and…

A: Let X be poison random variable P(X=0)=0.05 variance of X=?

Q: In an immunization site, the time for people before they were given their immunization shot is…

A: Solution

Q: The time spent waiting in the line is approximately normally distributed. The mean waiting time is 6…

A: Given information- Mean waiting time, μ = 6 minutes Variance of the waiting time σ2 = 9 minutes So,…

Q: Suppose a batch of metal shafts produced in a manufacturing company have a variance of 6.25 and a…

A: Suppose the random variable x defines the diameter of metal shafts.

Q: The following is the summary of a sample data collected on n=10 students on x= # of hours spent…

A: We have to calculate MSE for regression of y on x

Q: The weight of a 5th grader is normally distributed with a mean of 65 pounds and a variance of 86…

A: Question 3:Introduction:Let X be the weight of a randomly selected 5th grader. The mean weight is μ…

Q: When a random variable X follows binomial distribution, the probability of success on one trian…

A: Answer: From the given data, number of trials is equal to = n = 125 The probability of success on…

Q: Find the variance of the random variable Z = 1−Y

A: Given that, Y denotes the proportion  of impurities in a batch and density function of Y : f(y) =…

Q: Suppose X is a random variable with a mean of 10 and a variance of 100. suppose Y is a random…

A:

Q: The lifetime of a light bulb is normally distributed with the mean 3000 hours and a variance of 1392…

A: We have given that,  The lifetime of a light bulb are normally distributed with mean (Mu) = 3000…

Q: The yield in pounds from a day's production is normally distributed with a mean of 1500 pounds and…

A: The following information has been given: Let X be a normally distributed random variable that…

Q: If X1, X2,.., X100 are 100 random variables that are identically, independently and normally…

A: Solution: Let X1, X2,…….,X100 are random variables follow normal distribution with mean µ=150 and…

Q: The reaction time to a certain psychological experiment is considered to be normally distributed…

A:

Q: variances of Yk+1, V

A:

Q: sample of n = 10 score has ss= 108 what is the variance for this sample

A:

Q: The service times for customers coming through a checkout counter in a retail store are independent…

A:

Q: horses in a large stable have a mean weight of 1354 lbs, and a variance of 9604. What is the…

A: Suppose the horses in large stable have a mean weight of 1354lbs and variance of 9604. X~N (µ=1354,…

Q: A sample of final exam scores is normally distributed with a mean equal to 20 and a variance equal…

A: Given that a sample of final exam scores is normally distributed with mean, and variance, .

Q: Suppose Y = 6x-8, where x is a random variable with mean 2 and a variance of 4/3. Determine the…

A:

Q: For a random variable X with standard deviation 5, Variance of 2x + 4 is

A: It is given that, Standard deviation of X is 5 Now, The variance of X is =52=25

Q: Suppose it is known that the response time of healthy subjects to a particular stimulus is a…

A:

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.