A manufacturer knows that their items have a lengths that are skewed right, with a mean of 17.9 inches, and standard deviation of 3.8 inches. If 47 items are chosen at random, what is the probability that their mean length is greater than 16.8 inches? (Round answer to four decimal places)

Q: A manufacturer knows that their items have a lengths that are skewed right, with a mean of 19.4…

A: Solution :  Mean = 19.4 Standard deviation = 2.8 Sample size = 36 P(xbar > 18) z-statistic: (xbar…

Q: Janice measures the circumferences of the trunks of trees in the woods near her house for a science…

A: The mean is 72 inches and the standard deviation is 5 inches.

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A: Given that  Success of probability p =2/8=0.25 Number of trials n=20 X~binomial (n,p)

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A: The mean is 120 minutes and standard deviation is 30 minutes.

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A: Standard deviation:The standard deviation indicates by how much each observation differs from a…

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Q: If the mean height of a population of students is 68 inches with standard deviation 3 inches, what…

A: Given that      The mean height of a population of students is 68 inches with standard deviation 3…

Q: The probability that an individual is left handed is 0.15 in a class of 60 students. What is the…

A: Given data: The given probability is p=0.15. The numbers of students are n=60. The expression for…

Q: Suppose the mean height in inches of all 9th grade students at one high school is estimated.

A: Population standard deviation, σ =3 inches Sample size n=6

Q: The average score of this quiz is 24 points with a standard deviation of 1.5 points. What is the…

A: Let us assume that X=score of a quizX follows a normal distribution with mean=24 and standard…

Q: If 70 shafts are sampled at random from the batch, what is the probability that the mean diameter of…

A: Let X be the random variable of the diameter of metal shafts produced in a manufacturing…

Q: If the probability of defective bolt is 0.1, find the mean and the standard deviation for the number…

A: Given the probability of a defective bolt is, 0.1 That is, p=0.1 The total number of bolts is, n=400…

Q: The amount of pyridoxine in grams per multiple vitamin pill has a mean of 180 and a standard…

A: Given,mean(μ)=180standard deviation(σ)=24sample size(n)=64

Q: Suppose a probability and statistics class took an exam that had a mean of 60 and a standard…

A: Given, E(X)=60 SD(X)=12   After 10 Point curve Let Y be new variable.

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A: Consider X be a random variable which follows normal distribution indicates the distance of fly…

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

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Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

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Q: Proctor & Gamble reported that an American family of four washes an average of 1 ton (2000…

A: Introduction:Here, the suggested population mean, μ = 2,000 pounds.The population standard…

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Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

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Q: Assume that the heights of men are normally distributed with a mean of 69.5 inches and a standard…

A: It is given that  Mean, μ = 69.5 Standard deviation, σ = 2.1 Sample size, n = 36

Q: The average person uses 130 gallons of water daily. If the standard deviation is 35 gallons , find…

A: Given that, Mean = 130 Standard deviation = 35 Sample size = 25

Q: use an ti84 device to solve.  The head of maintenance at XYZ Rent-A-Car believes that the mean…

A: Given: Mean μ=4959 Standard deviation σ=448 Sample size n=43

Q: The average score of this quiz is 24 points with a standard deviation of 1.5 points. What is the…

A: Given data,μ=24σ=1.5P(X<21.9)=?

Q: a) If one fly ball is randomly chosen from this distribution, what is the probability that this ball…

A: Mean = 245s = 54

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

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Q: A particular fruit's weights are normally distributed, with a mean of 455 grams and a standard…

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Q: The NJ Department of Health has reported the average life span of NJ residents is 81 years. If the…

A: Let "X" be the average life span of NJ residents

Q: a study of 880 homeowners in a certain area showed that the average value of the homes was $82,000,…

A: Answer: From the given data, Mean (μ) = 82000 Standard deviation(σ) = 5000 Sample size(n) = 50 X…

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

A: