A recent study of the lifetimes of cell phones found the average is 24.3 months. The standard deviation is 2.6 months. If a company provides its 49 employees with a cell phone, find the probability that the mean lifetime of these phones will be (a) less than 24.8 months (b) more than 25 months

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Q: At a large department store, the average number of years of service was 13.5 years with a standard…

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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…

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Q: The amount of snowfall falling in a certain mountain range is normally distributed with an average…

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Q: Tiger Woods hits an average driver 287.2 yards with a standard deviation of 24.6 yards. What is the…

A: The probability value is calculate by means of standard normal variate with the random variable,…

Q: The scores in a cricket tournament are normally dostributed with mean 211 runs and standard…

A: From the provided information, Mean (µ) = 211 Standard deviation (σ) = 34 X~N (211, 34)

Q: According to the study, the average number of hours that the student spent studying per week in the…

A: From the provided information, Mean (µ) = 56 hours Standard deviation (σ) = 14 hours X~N (56, 14)

Q: the life expectancy for a species of certain insects is normally distributed with mean of 14.3…

A: It is given that the mean is 14.3 and the standard deviation is 4.3.

Q: The average rainfall received in New Jersey in the past few months was 3.6 inches with a standard…

A: Let X denotes the rainfall received in New Jersey. The average rainfall received in New Jersey in…

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

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Q: The producer of a weight-loss pill advertises that people who use the pill lose, after one week, an…

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Q: A company makes batteries that have life spans with a mean of 3000 hours and standard deviation of…

A: From the given information, Sample size (n) = 85 Mean (µ) =3000 Standard deviation (σ) =70 Consider,…

Q: In a study of work patterns, data from 669 subjects were collected. For the time spent in child…

A: We have given that,  Let X be the random variable from normal distribution with mean (μ) = 23.08,…

Q: A study showed that the average number of hours children in the US watch television each day is 4…

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Q: The mean time spent solving this problem is 4.25 minutes with a standard deviation of 1.7 minutes.…

A: Given Information: Population mean (u) = 4.25  Standard deviation (s) = 1.7 Sample size (n) = 32…

Q: The average number of pounds of red meat a person consumes each year is 196 with a standard…

A: We are given,μ = 196σ = 22n = 60

Q: The average age of doctors in a certain hospital is 48.0 years old with a standard deviation of 5.0…

A: Given data,Mean μ=48standard deviation σ=5If n=32P(45<X<51)=?

Q: A 120-watt fluorescent light has an average brightness of 1986 lumens, with a standard deviation of…

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Q: In a population of heroin users, the mean duration of heroin abuse is 5 years with a standard…

A: From the provided information, Mean (µ) = 5 years Standard deviation (σ) = 3 years X~N (5, 3) Sample…

Q: Suppose the horses in a large stable have a mean weight of 1354 lbs and a standard deviation of 98.…

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Q: If the mean time is between unscheduled maintained of lcd displays in a hospital scan facility is…

A: We have given that λ = 1/4000 Let X is a random variable shows the time ofunscheduled maintenance.…

Q: The record of 35 randomly selected participants of a marathon was selected. The mean time it takes…

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Q: The producer of a weight-loss pill advertises that people who use the pill lose, after one week, an…

A: We have to find out given probability..

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A: Given Mean=mu=700 Standard deviation=sigma=120 n=144

Q: annual precipitation amounts in a certain mountain range are normally distributed with a mean of 82…

A: Given,sample size(n)=25mean(μ)=82standard deviation(σ)=9

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Q: A research scholar from UCLA reports that mice will live an average of 40 months when the diet is…

A: Given: Age of rat is normally distributed μ=40 monthsσ=6.3 months

Q: The Wechsler IQ test is normally distributed with mean 100 points and standard deviation 15 points.…

A: Solution let Xdenote Wechsler IQ test is normally distributed with mean 100 points and standard…

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

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Q: A study shows that the intelligence quotient (IQ) of adults in a country follows a normal…

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Q: IUSS pill advertises that people who use the pill lose, after one week, an average (mean) of 1.8…

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Q: According to PSA, the probability of a randomly selected 90-year old Filipino survives for at least…

A: Given information: n=20p(success=survive another year)=82% or 0.82q(failure= not survive another…

Q: Suppose the average age of a Tulane undergraduate is 20 years with a standard deviation of 1.2…

A:

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.