The life of a certain company's CD players is normally distributed with a mean of 4.1 years and a standard deviation of 1.3 years. A CD player is guaranteed for 3 years. Find the probability that a CD player will break down after the guarantee period (x>3).

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 7 years,…

A: According to the given information, we have The distribution is normal. Mean = 7 years and Standard…

Q: The lengths of time spent )in a store are normally distributed with an average of 50 minutes and a…

A:

Q: The average life of a bread-making machine is 7 years, with a standard deviation of 1 year. Assuming…

A: Mean = 7 Standard deviation = 1 Sample size = 9

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

A:

Q: certain type of storage battery lasts on the average 3.0 years, with a standard deviation of 0.5…

A:

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

A: From the provided information, Mean (µ) = 170 inches Standard deviation (σ) = 20 inches X~N (170,…

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

A: Dgg

Q: The mean time required to assemble a bicycle is 20.5 minutes and the standard deviation is 2.3…

A: Population mean μ=20.5, standard deviations σ=2.3  Let X be the assemble a bicycle X~N(μ=20.5,…

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

A:

Q: The average daily high temperature in June in LA is 77°F with a standard deviation of 5°F. Suppose…

A: From the given information, let X be the temperature in June. Average daily high temperature…

Q: The average battery life of laptop computers is 5.8 hours with a standard deviation of 1.4 hours.…

A: We have given that , Mean = 5.8 , Sd = 1.4 , We need P(X>8) = ?

Q: the average age of bank managers is 40 years. assume the variable is normally distributed. if the…

A: The age of manager is normally distributed with mean μ=40 years and standard deviation σ=5 years. To…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 4 years,…

A: Given that  A manufacturer knows that their items have a normally distributed lifespan. Mean (μ) = 4…

Q: According to actuarial tables, life spans in the United States are approximately normally…

A: Let X denote the life spans in the United States and it follows normal distribution with a mean of…

Q: Suppose the lifetime of a refrigerator is normally distributed with a mean of 2500 days and a…

A: a.  We know, PZ0.025 < x¯-μσn < Z0.975=0.95 Using Excel,   Therefore, P-1.96 <…

Q: A study of the amount of time it takes a mechanic to rebuild the transmission for a 2005 Chevrolet…

A: GivenMean(μ)=8.4standard deviation(σ)=1.8sample size(n)=38

Q: A certain type of battery has a mean shelf life of 600 days with a standard deviation of 28 days. a.…

A: Given data,μ=600σ=28

Q: A certain model of automobile has its gas mileage (in miles per gallon, or mpg) normally…

A: Given Information :  A certain model of automobile has its gas mileage (in miles per gallon, or mpg)…

Q: The heights of adult males are known to be normally distributed with a mean of 70 inches and a…

A: Answer 1 of 1We are given the heights distribution here as:X ~ N(u = 70, sigma = 2)a) The…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 11.8…

A: The mean is 11.8 and the standard deviation is 2.

Q: The mean time required to assemble a bicycle is 20.5 minutes and the standard deviation is 2.3…

A: The objective is to find the probabilities that the time required to assemble a bicycle is below 19…

Q: The average rainfall, recorded to the nearest hundredth of a centimeter, in New York City, for the…

A: Let X be the random variable from normal distribution with mean or average (μ) = 9.32 and standard…

Q: soon-to-be-introduced cell phone has an expected service life that can be modeled by a normal…

A: Given Consider the following information given - Mean service life = 6 years Standard deviation of…

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

A: Given Information: Mean μ=196 Standard deviation σ=22 Let X denote the number of red meat a person…

Q: he average credit card debt for public school teacher is 14,975. If the debt is normally distributed…

A: Given, μ=14,975 σ=5,650

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 5.6…

A: Given, μ=5.6σ=1.8

Q: Suppose that the weights of airline passenger bags are normally distributed with a mean of 47.88…

A: Solution-: Given: μ=47.88,σ=3.09 We find the probability that 4 or fewer bags weigh greater than 50…

Q: Assume females have pulse rates that are normally distributed with a mean of 72 beats per minute and…

A: Given that: Mean = 72 beats S. D. = 12.5 beats Sample size (n)  = 25 By using standard normal…

Q: A sample of university students has an average GPA of 2.78 with a standard deviation of 0.45. If GPA…

A: Let X be a continuous random variable of average GPA of university students is normally​ distributed…

Q: Given that pregnancies have a mean of 266 days and standard deviation of 16 days, it is found that…

A: We have given that,  X be the random variable from normal distribution with mean = 266 and standard…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 7.3…

A: Please refer to the image below.

Q: A certain mobile app has a mean delay for messaging of 75 ms with a standard deviation of 4.5 ms.…

A: X~N(mu=75, sigma^2=4.5^2) We want to find  P(Xbar>76)= ?

Q: The average age of a vehicle registered in the United States is 96 months. Assume the standard…

A: Let X be the random variable from normal distribution with average or mean (μ) = 96 months, standard…

Q: The life of a vacuum cleaner is normally disyributed with mean 5 years and standard deviation 2…

A:

Q: The average credit card debt for college seniors is $3262. If the debt is normally distributed with…

A: It is given that the average credit card debt for college seniors is $3262. If the debt is normally…

Q: On the distant planet Cowabunga, the weights of cows have a normal distribution with a mean of 468…

A: Given values, Now, calculate the z value

Q: A certain type of storage battery last on average, 3.0 years with a standard deviation of 0.5 year.…

A:

Q: The weights of a population of barrels are normally distributed with a mean of 45.0 lb and a…

A: From the provided information, Mean (µ) = 45.0 lb Standard deviation (σ) = 7.9 lb X~N (45, 7.9) Let…

Q: Annual precipitation in a certain city is normally distributed with a mean of 99 inches, and a…

A: Given: standard deviation(σ) = 18 inches sample size(n) = 35 population mean(μ) = 99 inches

Q: The average height of flowering cherry trees in a certain nursery is 10.5 feet. If the heights are…

A:

Q: On the distant planet Cowabunga, the weights of cows have a normal distribution with a mean of 568…

A: Givan Mean=568 standard deviations=76

Q: The amounts of time per workout an athlete uses a stairclimber are normally​ distributed, with a…

A:

Q: The life expectancy of Timely brand watches is normally distributed with a mean of four years and a…

A: Given that The life expectancy of Timely brand watches is normally distributed with a mean of four…

Q: items have a normally distributed lifespan, with a mean of 14.9 years, and standard deviation of 0.8…

A:

Q: On the distant planet Cowabunga , the weights of cows have a normal distribution with a mean of 542…

A: Let X be the weight of cows which follows normal distribution with mean 542 pounds and standard…

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

A: The random variable waiting time follows normal distribution. We have to find the probability that…

Q: The life of a Radio Shack record player is normally distributed with a mean of 3.3 years and a…

A: Given,   Mean = 3.3 Standard deviation = 0.8   The objective is to find the probability that a…

Q: The standard deviation of the lifespan of a certain brand of LED light bulbs is 22 months. The…

A: Given Mean=144 Standard deviation=22 n=95

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 10.3…

A:

Q: At a large manufacturing company the mean age of workers is 37 years, and the standard deviation is…

A: When the given sample size is more, that means 30 are more than 30, then we use a large sample test.…

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.