In a building, the lifetime of a bulb has an exponential distribution with a mean of 2000 hours. If there are 500 bulbs in the building, how long (in hours) will it be before 100 of them have burned out?

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Q: a) Is the data for Facebook time series or cross-sectional? b) Comment on the trend between age and…

A: Provided information is,  Bar graph of social media users according to age group is given. a) Time…

Q: find out the mean profits:

A: We have to calculate the mean for given grouped frequency distribution of profits per shop.

Q: 4) Predict the acres per fire for a fire occurring in 2025. Is this a reliable prediction? Why or…

A: Note: Hey there! Thank you for the question. As you have particularly mentioned that you need help…

Q: Based

A: Equation that was created: y=47003x  + 51503y =1566.67x + 1716.67

Q: prove that If we add a constant (say, d) for all data values, Geometric mean Value will be affected.…

A: Geometric mean of a data distribution a1, a2, a3,..,an is nth square root of product of all data…

Q: The life time of an electrical part follows an exponential distribution with mean of 5 years.…

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Q: The length of time for telephone conversation (in minutes) is exponentially distributed. The mean…

A: Given Data: The average mean of conversation is: E(x)=3 minutes The time till which the conversation…

Q: Suppose that the time to failure (in hours) of fans in a personal computer can be modeled by an…

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Q: Suppose that losses follow an exponential distribution with mean 500. If a deductible is set at 300,…

A: From the given information, it is clear that,  X follows exponential distribution with mean μ=500.…

Q: For the Hawkins Company, the monthly percentages of all shipments received on time over the past 12…

A: The given data is: .

Q: The mean age of a class of twenty-five students is 23.8 years. How old would a twenty-sixth student…

A: The mean age of a class of twenty-five students is 23.8 years. The formula to calculate the mean…

Q: Consider that the life time of a particular brand of laptop battery follows exponential distribution…

A: Given: The mean value of battery is, μ=10 years. The age of battery is, n=7 years. The objective…

Q: If 13 items are picked at random, 4% of the time their mean life will be less than how many years?

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Q: A manufacturer knows that their items lifespans are normally distributed according to…

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Q: The length of time a particular smartphone's battery lasts follows an exponential distribution with…

A: We know that the  The Sum of exponential variate is defined as Gamma variate i.e. if X1, X2,...,Xn…

Q: Following table presents the quarterly market share of Tasty Food Company; Quarter Firm’s Actual…

A: Here given that w= 0.3 So (1-w)= 0.7 Exponential smoothing predicted values are given by, Ft=…

Q: Suppose that historically, the proportion of people who trade in their old car to a car dealer when…

A: Givensample size(n)=115No.of old cars(x)=46p^=xn=46115=0.40

Q: In 2007, a university study was published investigating the crash risk of alcohol impaired driving.…

A: The data set is: BAC Risk 0 1 0.01 1.03 0.03 1.06 0.05 1.38 0.07 2.09 0.09 3.54…

Q: Based on historical data, on average, Florida experiences one flooding event every 2.4 months.…

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Q: Suppose that the time to failure (in hours) of fans in a personal computer can be modeled by an…

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Q: The below table contains the total number of deaths worldwide as a result of tsunamis for the period…

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Q: The following table lists remaining life expectancy, E, in years for females of age x. x (yr) 50 60…

A: We have life expectancy E in years for females of age x. We have given Life expectancy, Eyr=33.8 for…

Q: The time it takes a mechanic to change the oil in a car is exponentially distributed with a mean of…

A: Given : The time it takes a mechanic to change the oil in a car is exponentially distributed with a…

Q: The length of time a person shops for groceries can be modeled by an exponential distribution with…

A: Given, Let X be the length of time. X is exponentially distributed Average= 27 mins

Q: Suppose that the time to failure (in hours) of fans in a personal computer can be modeled by an…

A: Suppose that the time to failure (in hours) of fans in a personal computer can be modeled by an…

Q: Suppose that the time to failure (in hours) of fans in a personal computer can be modeled by an…

A: Given : Suppose that the time to failure (in hours) of fans in a personal computer can be modeled by…

Q: Based on historical data, on average, Hoboken experiences one flooding event every 2.4 month. Assume…

A: Consider a random variable X which follow exponential distribution and it represents the time…

Q: The magnitudes of earthquakes recorded in a region of North America can be modeled by an exponential…

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Q: Based on historical data, on average, Hoboken experiences one flooding event every 2.4 month. Assume…

A: It can be assumed that the time between flooding events can be modelled using an exponential…

Q: The manager of a supermarket tracked the amount of time needed for customers to be served by the…

A: From the provided information, The checkout times are exponentially distributed with a mean of 5…

Q: Suppose that the time to failure (in hours) of fans in a personal computer can be modeled by an…

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Q: Along with interest rates, life expectancy is a component in pricing financial annuities. Suppose…

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Q: Suppose a biologist collected data on the weight of 50 lab rats that were 4 weeks old. The boxplot…

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Q: The handle time of all calls in a call center is log-normally distributed. What can we say about the…

A: The mean median and mode of a log normal disribution is known as- Mean=eμ+12σ2Median=eμMode=eμ-σ2

Q: Suppose that the time to failure (in hours) of fans in a personal computer can be modeled by an…

A: 1) Solution  The proportion of fans will last at most 10000 hours is 0.9502

Q: The time to failure of a component in an electronic device has an exponential distribution with a…

A: Given :  Median = 4

Q: Consider that the lifetime of a particular brand of laptop battery follows an exponential…

A: Exponential Distribution: A continuous random variable X is said to follow Exponential distribution…

Q: The time intervals between successive barges passing a certain point on a busy waterway have an…

A: Solution: Let X be the time intervals between successive barges passing a certain point on a busy…

Q: Suppose that the length of long distance phone calls, measured in minutes, is known to have an…

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Q: The following graph shows the mean change in mass of two groups of animals fed on different diets…

A: The following graph shows the mean change in mass of two groups of animals fed on different diets…

Q: The manager of a supermarket tracked the amount of time needed for customers to be served by the…

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Q: Discuss the connection between the Poisson and exponential distributions.

A: The exponential and Poisson distribution are methods used to measure the probability and trends…

Q: The working life time, in years, of a particular model of electric oven is exponentially distributed…

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Q: Ten patients with advanced diabetic nephropathy (kidney complications of diabetes) were treated with…

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Q: The following data represent the number of major hurricane strikes in a particular country each…

A: Given: Cubic function of best fit is: y=0.159x3-2.320x2+9.330x-4.2142 Using graphing Utility we…

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.