The time it takes a CPU to process a certain type of job is normally distributed with mean 25 seconds and standard deviation 2 seconds. If a sample of 16 such jobs is observed, what is the probability that the sample variance will exceed 4? The probability (A)0.4530 (B)0.4514 (C)0.9999 (D)0.5567

Q: A leading magazine (like Barron's) reported at one time that the average number of weeks an…

A: The objective of this question is to find the probability that a sample of size n=58 is randomly…

Q: Suppose the length of the pregnancies of a certain animal are approximately normally distributed…

A: It is given that  Mean, μ = 285 Standard deviation, σ = 27 Sample size, n = 18

Q: A binomial random variable has mean 1.8 and variance 1.44. Determine complete binomial probability…

A: Given information: A binomial random variable has mean 1.8 and variance 1.44. Need to find the…

Q: How many standard deviations away from the mean is a CD player that lasts 8 years? What is the…

A: Given Information: Mean μ=7.1 Standard deviation σ=1.4

Q: The patient recovery time from a particular surgical procedure is normally distributed with a mean…

A: Mean ()=5.7standard deviation ()=2.3

Q: Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 56…

A: The provided information is  µ=56 σ=3.3 P(X>60) a.P(X-µσ>60-563.3)=P(z>1.21)=0.1131   (from…

Q: The mean gas mileage for a hybrid car is 56 miles per gallon. Suppose that the gasoline mileage is…

A: As per our guidelines we are suppose to answer  only three sub parts. Given,mean(μ)=56standard…

Q: Suppose I have an unfair coin, it lands on heads 75% of the time.  If I flip this coin four times,…

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Q: A population of normally distributed scores has a mean of 50 and standard deviation of 12.  What is…

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Q: Mr. Rose is a new quality-control inspector at a factory that produces axles for a certain model of…

A:

Q: racing car consumes a mean of 107 gallons of gas per race with a variance of 49. If 46 racing cars…

A: Given Mean=107 Variance =49 N=46

Q: Cititon Forest contains a population of 326 chupacabra, whose masses have a mean of 30.2 kg and a…

A: Given that ; N = 326 u = 30.2 kg n = 70 kg ? = 7.4 kg By using standard normal distribution we solve…

Q: The time it takes for a statistics professor to mark a single midterm test is normally distributed…

A: n = 55

Q: Suppose IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What…

A:

Q: Salaries for senior Civil engineers per year have known mean of 80 K dollars and standard deviation…

A: We have given that  Mean(µ) = 80Standard deviations (σ) = 3.4X ~ N (µ, σ )= N(80, 3.4)

Q: Suppose that the distribution of the lifetime of a car battery produced by a certain car company is…

A: The mean of the normal distribution is  hours. The variance of normal distribution is The standard…

Q: The time it takes for a statistics professor to mark  a single midterm test is normally distributed…

A: From the provided information,

Q: Suppose that heights of 10-year-old boys in the US vary according to a normal distribution with mean…

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Q: In 2001 there were 869 road fatalities in Virginia, according to the Virginia Department of Motor…

A:

Q: A recent survey suggests that the working residents of math city have an average commute of 35…

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A:

Q: Men’s heights in the USA are normally distributed with a mean of 69 inches and a standard deviation…

A: Given data,μ=69σ=2.7

Q: You roll a die. If it comes up a 6, you win $100. If not, you get to roll again. If you get a 6 the…

A: a) The probability model for the amount you win is:EventProbabilityWinnings61/6$100Not 65/6 *…

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A:

Q: Suppose that the height distribution of students in your class was normally distributed with mean 68…

A:

Q: The time that an Olympic skier takes on a downhill course has a normal distribution with a mean of…

A: The given values are:Mean (μ) = 85.5 secondsStandard deviation (σ) = 0.8 secondsLower limit (X1) =…

Q: 2. Factory produces whiteboard markers. The production process can be modelling by normal…

A: Solution According to guideline we solve only three subpart

Q: Suppose that the body lengths of adult male crested porcupines in a certain region in the U.S. are…

A: The random variable X is defined as the body lengths of adult male crested porcupines in a certain…