Q2: The life of a semiconductor laser at a constant power is normally distributed with a mean of 7500 hours and a standard deviation of 500 hours. a. What is the probability that a laser fails before 5500 hours? b. What is the probability that a laser lasts more than 8250 hours? c. What is the life in hours that 95% of the lasers exceed?

Q: A study indicates that 18- to 24- year olds spend a mean of 115 minutes watching video on their…

A: Given that.   X~N( μ , ?^2 )   μ= 115    , ?=20   Z-score =( x - μ )/?

Q: Es On their website, a property management company states that the mean monthly rent for apartments…

A: As per bartleby guideline expert have to answer first three subparts only dear student please upload…

Q: A local fast food restaurant advertises an average service time of u = 3 minutes with a standard…

A: Given Data : Population Mean,μ = 3 Population Standard Deviation,σ = 0.39

Q: Q2: The diameter of the dot produced by a printer is normally distributed with a mean diameter of…

A: Given : Diameter of the dot is normally distributed with mean 0.002 and standard deviation 0.0004

Q: The average number of miles driven on a full tank of gas in a certain model car before its​ low-fuel…

A: It is given that the mean is 399 and the standard deviation is 36.

Q: Q2/ The speed of a file transfer from a server on campus to a personal computer at a student's home…

A:

Q: b. The weekly amount spent for maintenance and repairs in a certain company was observed, over a…

A: We have to find given probability.

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

A: Solution: Let X be the monthly utility bills in a city. From the given information, X follows normal…

Q: The life of a semiconductor laser at a constant power is normally distributed with a mean of 7500…

A:

Q: For 300 trading​ days, the daily closing price of a stock​ (in $) is well modeled by a Normal model…

A: X follows a Normal distribution with mean = 195.03 and S.D = 7.15 Then z=(x-mean)/SD =…

Q: The average rainfall, recorded to the nearest hundredths of a cm, in Roanoke, Virginia for the month…

A:

Q: Suppose that the average amount of ice cream that children eat at birthday parties is 3.6 oz, with a…

A: a. Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: Q2: The line width of for semiconductor manufacturing is assumed to be normally distributed with a…

A: Please see the attachment

Q: Suppose that 100,000 recent grads have starting salaries which are normally distributed with a mean…

A: Given that  μ=120,000σ=20,000 b) Consider the probability that the salary above $131,200 is,…

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

A: Given: The mean amount of times that sales managers devote to their jobs per week is μ=55 hours. The…

Q: In Turkey, the time devoted to the sport of university students for 30 minutes daily. average and 3…

A: Since you have asked question with multiple sub parts, we will solve first 3 sub parts for you. To…

Q: The time required to complete a laboratory strep test is normally distributed with a mean time of 70…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: Suppose a company produces lightbulbs with a mean lifetime of 1000 hours and a standard deviation of…

A: Given that, Mean= 1000 And standard deviation, sigma= 50 We know that, Z Score= (X-mu)/sigma

Q: In​ 2008, the per capita consumption of soft drinks in Country A was reported to be 18.83 gallons.…

A: Let "X" be the per capita consumption of soft drinks in Country A . Refer Standard normal…

Q: 1) The time until recharge for a battery in a smartphone is normally distributed with a mean of 250…

A: a. Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

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

A: Given: X~Normalμ=56,σ2=3.32

Q: A Survey among Seniors revealed that the number of hours spent Studying the week before final exams…

A: Given Mean=25 Standard deviations=7

Q: Suppose the average weekly rental for a compact car from Avis is $320 with a standard deviation of…

A:

Q: 3. The average consumption of rice that a rural male adult person in a year is 70 kilos. If 25 rural…

A: Ans# Here X ~ N( μ, σ)          Where  μ = 70   and σ = 112,       sample size n = 25         Find…

Q: The mass, m, of a particular hand-laid fiberglass part is normally distributed with a mean of 66 kg…

A: Let X denote the mass of a particular hand laid fiberglass part and it follows normal distribution…

Q: O An electrical firm manufactures light bulbs that have a length of life tha is normally distributed…

A: Given that, Mean, mu= 800 Standard deviation, sigma= 40 We know that, Z Score= (X-mu)/sigma

Q: he weight of the package is normally distributed with a mean of 650 g and a standard deviation of 42…

A: Given that  The weight of the package is normally distributed with a mean of 650 g and a standard…

Q: HA manufacturer of Energy Saving Lamps has a product life that is normally distributed with a…

A:

Q: An LED lightbulb manufacturer produces lights with a mean lifespan of 10,000 hours and a standard…

A:

Q: What is the probability that someone in Country A consumed more than 14 gallons of soft drinks in​…

A: Let X denote the consumption of soft drinks in Country A. Given that X follows N(mean = 19.11, SD =…

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

A:

Q: In your school with 400 Grade 11 students, the final examination in General Mathematics has a mean…

A: From the provided information, Mean (µ) = 38 Standard deviation (σ) = 4 X~N (38, 4) Here X be a…

Q: n a recent year, the average daily circulation of the Wall Street Journal was 2,276,207. Suppose the…

A: We have given that the random variable X is normally distributed with mean 2276207 and standard…

Q: The number of plants pollinated by bees follows a normal distribution with a mean of 6,543 plants…

A: Given information Mean µ = 6543 plants Standard Deviation σ = 35 plants

Q: The AAA reports that the average time it takes to respond to an emergency call is 25 minutes. Assume…

A:

Q: (b)The daily withdrawals from an ATM located at a service station is normally distributed with a…

A: x=5000σ=800

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

A: Given, μ=34 minutesσ=7 minutesn=9

Q: The time needed to complete a final examination in a particular college course is normally…

A:

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

A:

Q: A lawyer commutes daily from his suburban home to his midtown office. The average time for a​…

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: For a certain type of computers, the length of time between charges of the battery is normally…

A:

Q: Q2) A certain machine makes electrical resistors having a mean resistance of 60 ohms and a standard…

A: Given information: μ=60, σ=2

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…

Q: A local fast food restaurant advertises an average service time of u = 3 minutes with a standard…

A: Given Data : Population Mean,μ = 3 Population Standard Deviation,σ = 0.39

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.