2. Replacement times for CD players are normally distributed with a mean of 7.1 years and a standard deviation of 1.4 years (data from Consumer Reports). What is the probability that a randomly-selected CD player will have to be replaced in 8 years or less? Z-score:

Q: Traveling between University of Santo Tomas and Rizal Park, Manila via shuttle bus takes, on…

A: Given : Average bus time is: μ=31 minutes Standard deviation: σ=5 minutes The Z-score is calculated…

Q: A Texas Instrument calculator operating life is normally distributed with a mean of 3,850 hours, and…

A: Given information- Population mean, μ = 3850 hours Population standard deviation, σ = 350 hours…

Q: In a survey of a group of​ men, the heights in the​ 20-29 age group were normally​ distributed, with…

A: Given data,μ=69.7σ=3P(68<X<70)=?

Q: The average number of acres burned by forest and range fires in a large New Mexico county is 4,300…

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Q: Salaries at a large corporation are normally distributed with a mean of $45,000 and a standard…

A: The normal distribution shows the probability value using the standard score or raw score. It is…

Q: 2. A radar unit is used to measure speeds of cars on a motorway. The speeds are normally distributed…

A: Let X be the radar unit  X~N(mean μ=90, standard deviations σ=10) P(X>100)=?  Note: this…

Q: A set of final examination grades in an introductory statistics course is normally​ distributed,…

A: Let "X" be the final examination grades in an introductory statistics course. Find z-value: Note…

Q: The monthly utility bills in a city are normally​ distributed, with a mean of $100 and a standard…

A:

Q: Thwhe average arm height of jaguars is 16 inches, with a standard deviation of 2 inches. out of a…

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Q: Suppose the average speeds of passenger trains traveling from Newark, New Jersey, to Philadelphia,…

A: Solution: a. Let X-bar be the average speed of passenger. From the given information, X-bar follows…

Q: Given a distribution with a mean of 90 and a standard deviation of 10, what is the probability of…

A: Given Information: μ=90 σ=10 x1=85 x2=110

Q: Assume that the heights of adult puffins are normally distributed, with a mean of μ=μ= 15.9 inches…

A: Obtain the probability of obtaining a sample mean height less than 14.8 inches. The probability of…

Q: Male players use a regulation basketball that weighs 22.0 ounces with a standard deviation of 1.2…

A: In question, Given that Male players use a regulation basketball that mean weighs 22.0 ounces with a…

Q: Suppose math scores on the SAT are normally distributed with a mean of 500 and a standard deviation…

A:

Q: A set of final examination grades in an introductory statistics course is normally​ distributed,…

A: Given that, A set of final examination grades in an introductory statistics course is normally​…

Q: Suppose that the annual household income in a small Midwestern community is normally distributed…

A: Given : X ~ Nμ, σ mean, μ = $55000 S.D, σ = 4500 a. P(household will have an income between $50000…

Q: The amount of time that customers wait in line during peak hours at one bank is normally distributed…

A: Here it is given that, Mean (μ) = 12Standard Deviation (σ) = 2 Let X be a random variable which…

Q: Traveling between University of Santo Tomas and Rizal Park, Manila via shuttle bus takes, on…

A: Given that, μ=28,σ=5 and n=40 The mean and standard deviation of the sample mean is,

Q: Traveling between University of Santo Tomas and Rizal Park, Manila via shuttle bus takes, on…

A: Solution: Let X be the transport time. From the given information, X has mean µ=28 minutes and a…

Q: 3. The number of cars that passes through Sta. Mesa Highway every weekday resembles a normal…

A: Given that mean =8702 ,s.d =678 p( 7000 < x < 8000) =?

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

A: From the provided information, Mean (µ) = 56 Standard deviation (σ) = 3.2 Let X be a random variable…

Q: 2. A researcher claimed that the amount of time spent by boys and girls in social media each day is…

A:

Q: 21 The life of a drill bit has a mean of 16 hours and a standard deviation of 2-6 hours. Assuming a…

A: Given, Mean μ = 16Standard deviation σ = 2.6

Q: 1. The average salary of a sales lady in malls in Cebu is P530/day. Assume a normal distribution…

A: Given,mean(μ)=530standard deviation(σ)=92

Q: Sure Stone Tire Company has established that the useful life of a particular brand of its automobile…

A: Mean = 40000 Standard deviation = 5000

Q: Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 57…

A: Given X is normal Distributed with mean µ = 57.0 and standard deviation σ = 3.5 now will using…

Q: In an intelligence exam to determine the IQ of students, it is found out that the results are…

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Q: 1.) The average repair cost of a microwave oven is $55, with a standard deviation of $8. The costs…

A: 1) Given that the mean is $55 and the standard deviation is $8. The costs are normally distributed.…

Q: 1. The scores on a national achievement exam are normally distributed with a mean of 500 and a…

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Q: Traveling between University of Santo Tomas and Rizal Park, Manila via shuttle bus takes, on…

A: Let X be the transport time. From the given information, X has mean µ=28 minutes and a standard…

Q: Suppose that the waiting time for a license plate renewal at a local office of a state motor vehicle…

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Q: A z-score that is 6 points below the mean corresponds to a z = -2.00. What is the populations'…

A:

Q: Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 57…

A: Given data,μ=57σ=3.5

Q: Traveling between University of Santo Tomas and Rizal Park, Manila via shuttle bus takes, on…

A: Let us denote: X=time to travel between University of Santo Tomas and Rizal ParkGiven that X follows…

Q: Heights of 10 year olds, regardless of gender closely follow a normal distribution with mean 55…

A: Consider X as a random variable that follows a normal distribution with a mean 55 and standard…

Q: (b) The blood pressure reading for people aged 80 years old that are having high blood pressure is…

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Q: Suppose that the monthly charges for cell phone plans in the United States are normally distributed…

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Q: A quality control company was hired to stuudy length company. The team carefully measured the length…

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Q: Suppose the tires on your car have an average life expectancy of 60,000 miles, with a standard…

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Q: # 6- A set of data items is normally distributed with a mean of 90 and a standard deviation of 5.…

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Q: 21. The life of a drill bit has a mean of 16 hours and a standard deviation of 2-6 hours. Assuming a…

A:

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

A: From the provided information, Mean (µ) = 57 Standard deviation (σ) = 3.5 Let X be a random variable…

Q: it was determined that the survival time, in weeks, of an animal subjected to a certain exposure of…

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Q: Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 57…

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Q: Traveling between University of Santo Tomas and Rizal Park, Manila via shuttle bus takes, on…

A: Solution: Let X be the transport time. From the given information, X has mean µ=28 minutes and a…

Q: Traveling between University of Santo Tomas and Rizal Park, Manila via shuttle bus takes, on…

A: Solution: Let X be the transport time. From the given information, X has mean µ=31 minutes and a…

Q: In a murder trial in Los Angeles, a shoe expert stated that the heights of men with size 12 shoes is…

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: "Chá. Traveling between University of Santo Tomas and Rizal Park, Manila via shuttle bus takes, on…

A: Suppose, X be the time takes a shuttle bus. Assume that, X follows Normal distribution with average…

Q: Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 57…

A: Given, The proportion of light bulbs will last more than 60 hours is obtained as- The required…