A detergent company finds that a family in the country washes an average of 910 kilograms of clothes each year. If the population standard deviation is 85 kilograms, find the probability that the mean of randomly selected sample of 50 families of four will be greater than 900 kilograms?

Q: Suppose that in a certain Senior High School the average height of male students is 155.9 cm with…

A: GivenMean(μ)=155.9standard deviation(σ)=20.4sample size(n)=40

Q: A population has a standard deviation of 25 and a mean of 300. Given a random sample of size 100,…

A:

Q: Each month, an American household generates an average of 28 pounds of newspaper for garbage or…

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Q: An electrical company claims that the average life of the bulbs it manufactures is 1 300 hours with…

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Q: A study of the amount of time it takes a hiker to hike to the bottom of the Grand Canyon and back to…

A: Given: μ = 12 σ = 2.4 n = 9

Q: Suppose that from the past experience a professor knows that the test score of a student taking his…

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

Q: A manufacturer knows that their items have a lengths that are skewed right, with a mean of 6.1…

A: Given: Length of items = X X distribution is skewed towards right mean of X= 6.1 inches standard…

Q: At a large manufacturing company, the mean age of workers is 37 years, and the standard deviation is…

A: Given: Mean μ = 37 Standard deviation σ=6 Sample Size n = 44 As we know that if X~N(μ, σ) then…

Q: Suppose the scores, on a college entrance examination are normally distributed with a mean of 1000…

A: We have given that Suppose the scores, on a college entrance examination are normally distributed…

Q: From past experience, a professor knows that the test score of a student taking her final…

A: Given that the mean is 75 and variance is 25 That is, μ=75σ=25=5

Q: If X is a random variable having a normal distribu-tion, what are the probabilities of getting a…

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Q: A researcher wishes to estimate the average height of men for a certain region of the country. If…

A: Probability is the measure determine the likelihood of an event. Event is the outcome of an…

Q: An electrical company claims that the average life of the bulbs it manufactures is 1 300 hours with…

A: The mean is 1,300 and the standard deviation is 260 hours.

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 7.2 inches,…

A: Given data,μ=7.2σ=1.3P(x<4.8)=?

Q: On average a supermarket sells 500 litres of milk a day with a standard deviation of 50 litres. If…

A: Assume, X be the random variable representing the quantity of milk sold per day (in liters). It is…

Q: The weight of a bag of sugar is normally distributed with mean of 550g and a standard deviation of…

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Q: If a random sample of size 14 is drawn from a normally distributed population with mean 43.5…

A: Let, X=the variable Given that X follows a normal distribution with mean=43.5 and standard…

Q: If a continous random variable, x, is normally distributed with a mean of 100 and a standard…

A: GivenMean(μ)=100standard deviation(σ)=15

Q: The probability that a person who exercises and eats well has a heart attack is predicted to be 0.5…

A: We know that if; Y~Binomial(n,p)Then the expected value of Y is;E(Y)=npand the standard deviation of…

Q: A detergent company finds that a family in the country washes an average of 910 kilograms of clothes…

A: Given that: X is normal Distributed with mean µ = 910.0 and standard deviation σ = 85.0 By using…

Q: The heights of men in a city are normally distributed with mean 171 cm and SD 7 cm, while the…

A:

Q: A population has a standard deviation of 16. If a sample of size 64 is selected from this…

A: Given: Population standard deviation = sigma = 16 n = 64 P( sample mean within 2 units from…

Q: The probability that a person who exercises and eats well has a heart attack is predicted to be 0.3…

A: Given that  The probability that a person exercises and eats well has a heart attack is predicted to…

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 19.4…

A:

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 15.4…

A: We know it is normally distributed. So we can use the z - probability formula. z=x-μσ Here, μ -…

Q: The owner of a fish market has an assistant who has determined that the weights of catfish are…

A: Given information:

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 18.2…

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Q: At a large publishing company, the mean age of proofreaders is 36.2 years, and the standard…

A: Given - At a large proofreader company is ,the mean of proofreader is μ = 36.2 and standard…

Q: A new species of rabbit has an average body length of 45mm with a standard deviation of 3mm. In a…

A: Given that the new species of the rabbit has an average body of 45mm, which means the mean is 45mm…

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 15.5…

A: As per Bartleby guideline expert have to answer first question only dear student please upload other…

Q: Suppose X is a normally distributed random variable with a mean of 9.00. If the probability that X…

A: Obtain the value of the standard deviation of X. The value of the standard deviation of X is…

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Q: As the size of a simple random sample is increased, the standard error of the sample mean will…

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Q: At a certain beer bottling plant, the amount of beer that is put in a bottle is known to be…

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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: Suppose the scores, x, on a college entrance examination are normally distributed with a mean of…

A: Solution: Let X be the score on a college entrance examination. From the given information, X…

Q: For a populations mean of 22.3 and standard deviation 4, find the probability that the random…

A: The mean is 22.3 and the standard deviation is 4.

Q: The owner of a fast-food restaurant knows that, on average, 2.4 cars (customers) use the…

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Q: Suppose the scores, X, on a college entrance examination are normally distributed with a mean of…

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Q: Suppose x is a normally distributed random variable with a mean of 12 and a standard deviation of 3.…

A: Given,      Meanμ=12      Standard deviationσ=3

Q: Suppose that the starting salaries of MBAs at Wilfrid Laurier University (WLU) are normally…

A: Given the data MBA's at WPUNJ MBA's at Rutgers Mean μ1=62000 Mean μ2=60000 SD, σ1= 14500 SD,…

Q: From past experience, it is known that the number of tickets purchased by students standing in line…

A: Given μ=2.4σ=2.0

Q: The mean height of 15-year-old boys (in em) is 175 and the variance is 64. For girls, the mean is…

A: As given that : Mean for height of boys: X1=175 And variance : σ12=64 Mean for height of girls:…

Q: If a random variable that is normally distributed has a mean of 25 and a standard deviation of 3,…

A: Given,mean(μ)=25standard deviation(σ)=3

Q: The probability that a person who exercises and eats well has a heart attack is predicted to be 0.6…

A: It is given that n=19 and p=0.6.

Q: The scores in a large Algebra class are normally distributed with a mean of 65 and a standard…

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Q: If a continous random variable, x, is normally distributed with a mean of 100 and a standard…

A: Given : X is normally distributed with a mean of 100 and a standard deviation of 15.

Q: Solve the problem. Assume that male Siberian huskies' weights are normally distributed with a mean…

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