A manager from a certain well known department store found out the money their customers carry into the store is normally distributed with a mean of $258 dollars and a standard deviation of $35. In a sample of 76 Americans who walked into that store find the probability that a random customer will have more than $260 in his or her wallet.

Q: A recent law has been passed banning the use of hand-held cell phones while driving, and a survey…

A: The question is based on a discrete prob. distribution Given : Prob. that driver's refrain from…

Q: normally distributed length, with a mean of 14.9 inches, and standard deviation of 3.1 inches. If…

A: Hi! Thank you for the question, as per the honor code, we are entitled to solve one question at a…

Q: manufacturer of light bulbs produces bulbs that last a mean of 950 hours with a standard  deviation…

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Q: Ms. Berry is concerned about the average amount of food Fred, the elephant, eats each day. Zookeeper…

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Q: We get a group of 18 batteries and find that their average lifetime is 107 hours with a standard…

A: Hello! As you have posted 3 different questions, we are answering the first question. In case you…

Q: Of a large stockpile of used pumps, 20% are unusable and need repair. A repairman is sent to the…

A: The percentage of pump usual required repair is 20%. The time taken to test the pump is 10 minute.…

Q: A canning company that cans pineapple juice has a machine that automatically fills 16-ounce cans.…

A: Let X denote the amount of fill per can. Given that X follows N(mean = 16, SD = 1), then Z = (X -…

Q: A motorcar industry research study found that the tyre lifespan for economic sedan cars is normally…

A:

Q: An electrical appliance made by Company A has an average life of 2500 hours, with a standard…

A: Given: Company APopulation mean μ1=2500Population standard deviation σ1=500Sample size n1=300Company…

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 14.9…

A: As per the Bartleby guideline expert have to answer the first question only. Please submit other…

Q: A study indicates that 18- to 24- year olds spend a mean of 120 minutes watching video on their…

A: GivenMean(μ)=120standard deviation(σ)=20

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

A: We have given that, In a survey of a group of​ men, the heights in the​ 20-29 age group were…

Q: According to an NRF survey conducted by BIGresearch, the average family spends about $237 on…

A: (a)   Obtain the probability that they spend less than $135 on back-to-college electronics.   The…

Q: Cititon Forest contains a population of 297 chupacabra, whose masses have a mean of 40.1 kg and a…

A: Given that.   X~N( μ , ?^2 )   μ=40.1  , ?=8.3  , n=103   Z-score =( x - μ )/?

Q: Full-time college students report spending a mean of 29 hours per week on academic​ activities, both…

A: We have given that,  Let X be the random variable from normal distribution with mean (x̄) = 29,…

Q: According to Neilson & Co adults watch an average of 30 hours of a TV a week. Assume the population…

A: It is given that the mean is 30 hours, the standard deviation is 12 and the sample size is 30.

Q: The bank of American issues Visa and MasterCard credit cards. It is known that the balances on all…

A: Given information Mean µ = $756 Standard deviation  σ = $210 a) Probability that a randomly selected…

Q: Furnace repair bills are normally distributed with a mean of 263 dollars and a standard deviation of…

A: Here, µ = 263 and σ = 25.

Q: According to an NRF survey conducted by BIGresearch, the average family spends about $ 229 on…

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Q: The number of driving miles before a certain kind of tire begins to show wear is on the average of…

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Q: An electrical firm manufactures incandescent light bulbs that have a length of life (in hours) that…

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Q: According to an NRF survey conducted by BIGresearch, the average family spends about $237 on…

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Q: It is known that for a laboratory computing system the number of system failures during a month has…

A: It is known that for a laboratory computing system the number of system failures during a month has…

Q: In a health club, research shows that on average, patrons spend an average of 46.2 minutes on the…

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Q: ohn is practicing for a marathon. His training times follow a normal distrubition with a mean of 25…

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Q: Each month, a public market in Batangas generates an average of 30 pounds of plastic for garbage or…

A: Mean(µ) = 30Standard deviations (σ) = 4X ~ N (µ, σ )= N (30, 4)

Q: The average outstanding bill for delinquent customer accounts for a national department store again…

A:

Q: An insurance risk manager has observed that the most common insurance product purchased by business…

A: Given Information:  Mean value = 32.2 m Standard deviation = 0.3 m

Q: According to an NRF survey conducted by BIGresearch, the average family spends about $237 on…

A: We have given that the random variable X is normally distributed with mean $237 and standard…

Q: An electrical component is designed to provide a mean service life of 3000 hours, with a standard…

A: Given that: X is normal Distributed with mean µ = 3000.0 and standard deviation σ = 800.0 By using…

Q: A. C. Neilsen reported that children between the ages of 2 and 5 watch an average of 25 hours of…

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Q: The Public Service Student Loan Forgiveness program states that the average amount of student loan…

A:

Q: A CPA knows from past history that the average accounts receivable for a company is $521.72 with a…

A: Given: μ = ​$521.72 σ = $584.64 n = 100

Q: The life expectancy of a particular brand of tire is normally distributed with a mean of 60,000 and…

A:

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

A:

Q: Based on tests of the Chevrolet Cobalt, the miles per gallon in highway driving are normally…

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: In a behavioral study of gibbons, it was found that their song duration X is a random variable which…

A:

Q: In a certain experiment M & M candies are randomly grouped in bags of 40 pieces per bag. If 16 % of…

A:

Q: A census of the labor force in a large metropolitan area found that the time it takes for people to…

A:

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

A:

Q: The weight of people in a small town in Missouri is known to be normally distributed with a mean of…

A: Mean = 180 Standard deviation = 28 Sample size, n = 40

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

A:

Q: A soft drink vending machine dispenses soda into 12-ounce cups. Tests show that the actual amount of…

A: Soft drink vending machine dispenses soda into 12 ounce cups.  Define the Random Variable, X :…

Q: The distribution of the number of gallons of water used for taking a shower in the United States are…

A: Given information: n=30μ=17.2σ=4.2x¯=19

Q: What is the probability that an 18- to 24-year-old mobile subscriber spends less than 300 minutes…

A: From provided information, let X be variable that ACNielsen study indicates that mobile subscribers…

Q: A survey indicates that shoppers spend an average of 22 minutes with a standard deviation of 8…

A: Given,mean(μ)=22standard deviation(σ)=8

Q: A factory produces LED bulbs with an average lifespan of 50,000 hours and a standard deviation of…

A: Given dataMean = 50000Standard deviation = 4000If it is known that a bulb already has lasted for…

Q: Traveling between two campuses of a university in acity  via shuttle bus takes, on average, 28…

A: Let us denote X=the time for traveling between two campuses of a university in a city via shuttle…

Q: Long distance telephone calls are normally distributed with a mean of 8 minutes and a standard…

A: Given that, Mean = 8 Standard deviation = 2

Q: The weights of ice cream cartons are normally distributed with a mean weight of 10 ounces and a…

A: P(X>10.16)=1-Pz<x-μσ=1-Pz<10.16-100.6=1-P(z<0.27)=1-0.6064=0.3936 Therefore the…

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.