The times for a particular journey during rush hour in a certain city have a mean of 23.3 minutes and standard deviation 8.9 minutes. Using Excel or otherwise, determine the probability that the mean time taken for a random sample of 60 of the times of this journey is less than 25 minutes.

Q: Assume that women's heights are normally distrubuted with a mean of 63.6 inches and a standard…

A: From the given information, the mean is 63.6 and the standard deviation is 2.5.

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

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A: Given data,μ=69.7σ=3P(68<X<70)=?

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Q: Of all the companies on the New York Stock Exchange, profits are normally distributed with a mean of…

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Q: Assume that the foot length of adult males is normally distributed with mean 11 inches and standard…

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Q: Assume that the women's heights are normally distributed with a mean of 63.7 inches and a standard…

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

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Q: A veterinary researcher takes an SRS of 60 horses presenting with colic whose average age is 12…

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Q: Suppose that during any hour in a large department store, the average number of shoppers is 448,…

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Q: The amount of time that sales managers devote to their jobs per week is normally distributed with a…

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Q: THE SICK-LEAVE TIME OF EMPLOYEES IN A FIRM IN A MONTH IS NORMALLY WITH A MEAN OF 100 HOURS AND A…

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Q: A small retail store has customers whose ages are normally distributed, with a mean of 37.5 and a…

A: Let X denote the customer ages and it follows normally distribution with a mean of 37.5 and a…

Q: A local sports magazine reports the mean length of a baseball game to be 175.9 minutes with a…

A: Given, mean, μ= 175.9 minutes standard deviation,  = 27 minutes n = 30

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: A study indicates that the weights of adults are normally distributed with a mean ? of 140 lbs and a…

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Q: The Boeing 727 carries 200 passengers and has doors with a height of 72 inches. heights of men are…

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Q: The amount of time that sales managers devote to their jobs per week is normally distributed with a…

A: Given: μ=54σ=5n=30 a. The probability that randomly selected sales manager works for more than 55…

Q: The average hourly wage for manufacturing workers in the United States is $20.89 per hour, With a…

A: Give that  The hourly wage for manufacturing workers in united states is $20.89 μ = 20.89 Standard…

Q: Suppose the mean weight of school children's book bags is 17.5 pounds, with standard deviation 2.2…

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

A:

Q: If we know that the length of time it takes a college student to find a parking spot in the library…

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Q: assume that cans of coke are filled so that the actual amounts have a mean of 12 oz and a standard…

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Q: Assume that adults have IQ scores that are normally distributed with a mean of μ=105 and a standard…

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Q: The heights of 18-year-old men are approximately normally distributed with a mean of 68 inches and a…

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Q: A population of 25-28 year-old males has a mean salary of $29,321 with a standard deviation of…

A: From the information, the mean salary of $29,321 with a standard deviation of $2,120.

Q: Suppose the heights of 18-year-old men are approximately normally distributed, with mean 66 inches…

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Q: Which most closely reflects the probability that a randomly selected bulb would last fewer than 940…

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Q: Suppose that the number of gallons of milk sold per day at a local supermarket are normally…

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Q: The average lifetime of smoke detectors that a company manufactures is 5 years, or 60 months, and…

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Q: The ages of students in an evening stained glass making class at a community college are normally…

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Q: Suppose that the mean daily viewing time of television is 8.35 hours per household. Use a normal…

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Q: A courier services company has found that the delivery time for packages is normally distributed,…

A: Given : μ = 14 σ = 2 P(12≤X≤15) = P(X≤15) - P(X≤12)  P(12≤X≤15) = PX-μσ≤15-μσ - PX-μσ≤12-μσ…

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Q: The personal office at a large electronics firm regularly schedules job interviews and maintains…

A: Given: Population mean μ=34Population standard deviation σ=7 Sample size(n)  = 9 Consider X be the…

Q: The time that a shopper spends in the grocery store is normally distributed, with a mean of 45…

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Q: A fast food restaurant during its rush time has a mean waiting time of 15 minutes with a standard…

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Q: The vacation leave time of employees in a firm in a month is normally with a mean of 100 hours and a…

A: Given data: Mean = 100 hours Standard deviation  = 20 hours To find: P(X > 180 ) =  ?

Q: Furnace repair bills are normally distributed with a mean of 269 dollars and a standard deviation of…

A: Given: Population meanμ=269Sample size(n) =64Population standard deviationσ=20 Consider X be the…

Q: A book publisher claims that its mean book length is 250 pages with a standard deviation of 70…

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Q: The ages of patients in a hospital were normally distributed with a mean of sixty-three years and a…

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Q: An audit finds that the dollar amounts of invoices have a mean of $1,662 anda standard deviation of…

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Q: The weight of trucks traveling on a particular section of Highway 2H has a population mean of 15.8…

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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.