A catalog company that receives the majority of its orders by telephone conducted a study to determine how long customers were willing to wait on hold before ordering a product. The length of waiting time was found to be a random variable best approximated by an exponential distribution with a mean length of waiting time equal to 9.5 minutes. Find the waiting time at which only 9% of the customers will continue to hold. 11.8 minutes 0.9 minutes 0.1 minutes 15.8 minutes

Q: The Aluminum Association reports that the average American uses 56.8 pounds of aluminum in a year. A…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: An electric company has been selling a bulb, which was advertised as having an average life of 1,500…

A:

Q: A physical fitness association is including the mile run in its secondary-school fitness test. The…

A: It is given that the mean is 440 and the standard deviation is 40.

Q: 2006 Statistical Abstract of the United States reports on a survey that asked a national sample of…

A: *Answer:

Q: Consider a binomial random variable X with n = 5 and p = 0. 40, where X represents the number of…

A: Note: Hi there! Thank you for posting the question. As there are multiple sub parts, according to…

Q: A quality control expert at LIFE batteries wants to test their new batteries. The design engineer…

A: The normal distribution is the most useful theoretical distribution for continuous variable.  For…

Q: The fuel economy of a 2011 Lexus RX 350 2WD 6 cylinder 3.5 L automatic 5-speed using premium fuel is…

A: Solution-: Given: μ=20.5MPG,σ=1.25MPG      (a) What is the standard error of  x, the mean from a…

Q: Collina's Italian Cafe in Houston, Texas, advertises that carryout orders take about 25 minutes.…

A: Given,A random variable X~Exponential(θ=125)f(x)=125e-x25       ;  X≥0

Q: The amount of corn chips dispensed into a 18-ounce bag by the dispensing machine has been identified…

A:

Q: The factory workers in Brighton are prone to a disease called Pneumonia. In a recent survey in a…

A:

Q: The operation manager at a tire manufacturing company believes that the mean mileage of a tire is…

A:

Q: The Information Systems Audit and Control Association surveyed office workers tolearn about the…

A:

Q: A bakery keeps stock of a popular brand of cake. Previous experience shows the daily demand pattern…

A: Given data: Daily demand Probability 0 0.01 10 0.20 20 0.15 30 0.50 40 0.12 50 0.02…

Q: Automotive engineers have found that the gas mileage in highway driving of a certain sports utility…

A:

Q: Past records indicate that the probability of online retail orders that turn out to be fraudulent is…

A: For binomial distribution with success probability p and size n than Mean=n*p. Standard deviation =…

Q: In a test of physical fitness, a group of men ages 65 and older from a local retirement community…

A: Introduction:Denote X as the number of sit-ups that a randomly selected man aged 65 years or older…

Q: In a certain country, 47 percent of the population are on a strict diet. In a sample of 150…

A: We want to find expected value and variance

Q: The life span of a specific fan is an Exponential random variable with the mean of 12 years. 1. If…

A: GivenLife span of a specific fan is an exponential random variable  with the mean of 12…

Q: Business Weekly conducted a survey of graduates from 30 top MBA programs. On the basis of the…

A: Given: Formula: Find: Refer Standard normal table/Z-table OR use excel formula…

Q: Q3: The number of failures of a testing instrument from contamination particles on the product is a…

A: Given : Mean = λ1 hr = 0.05 failures Let X denoting the number of failures here in a time period…

Q: Wendy's restaurant has been recognized for having the fastest average service time among fast-food…

A: Let X denote the service time of Wendy’s restaurant and it follows the exponential distribution with…

Q: n 2018, the per capita consumption of coffee in the United States was reported to be 4.2 kg, or 9.24…

A:

Q: The life span of a specific fan is an Exponential random variable with the mean of 12 years. 1. If…

A: A continuous random variable X is said to follow Exponential distribution with parameter λ if its…

Q: In a crash test of 2018 Honda Odyssey​ minivans, collision repair costs are found to follow a normal…

A:

Q: Jump to... Suppose that the mass (in grams) of potato chips dispensed into a 20g packet has a normal…

A:

Q: The Information Systems Audit and Control Association surveyed office workers tolearn about the…

A:

Q: The amount of money a male spends in a certain clothing store is normally distributed with a mean of…

A: Let X be expenditure by male. Let Y be the expenditure by the female. So, X~N10, 10Y~N22, 16 to…

Q: The gestation period of humans follows a normal distribution with a mean of 266 days and a standard…

A:

Q: appliance store sells 9 refrigerators each week. 45% of all purchasers of a refrigerator buy an…

A: Formula : Binomial distribution is given by

Q: Wendy's restaurant has been recognized for having the fastest average service time among fast food…

A: Let the service time of Wendy be represented by the exponential distributed variable X.

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

A:

Q: A random sample of size n = 25 is drawn from a normal population with a variance of 16, what is the…

A:

Q: At a certain restaurant in Ohio, the number of minutes that diners spend at the table has a major…

A: Let X be the number of minutes diners spend at their table which follows normal distribution with…

Q: Each year, a large warehouse uses thousands of fluorescent light bulbs that burn 24 hours per day…

A: Obtain the probability that the lifetime of the bulbs is less than 582 hours.   The probability that…

Q: A hospital wants to determine if the type of treatment for pneumonia is a factor in recovery time?…

A: I have used Excel and the command is as follows  data > data analysis > anova:single factor…

Q: The average salary for bank managers in a certain city is $91,900 pesos per hour with a standard…

A: Solution-: Given: μ=$91900,σ=$24300 We find, P[a randomly selected bank manager has a salary that…

Q: wendy’s restaurant has been recognized for having the fastest average service time amongfast food…

A: a) Here, X denotes the service times. The average service times is 2.2 minutes. That is 1/ λ = 2.2.…

Q: The tread life of tires mounted on light-duty trucks follows the normal probability distribution…

A: The following information has been given: Let X be a random variable represents the tread life of…

Q: In a certain country, 47 percent of the population are on a strict diet. In a sample of 130…

A:

Q: Researchers conducted a study to determine whether magnets are effective in treating back pain. The…

A: Givenn1=28x1=0.56s1=0.84n2=28x2 =0.41s2=1.06 H0:μ1=μ2H1:μ1>μ2

Q: The highway fuel economy of a 2016 Lexus RX 350 FWD 6-cylinder 3.5-L automatic 5-speed using premium…

A:

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

A: Given data,μ=20.5σ=15.4n=40P(X>25)=?

Q: c) An engineering company manufactures a product with a mean of 48,000 and a standard deviation of…

A: c. The provided information is µ=48000 hours σ=6000 hours  Using normal distribution  i) After less…

Q: In a study of life expectancy in a certain region, the mean age at death was 70 years, and the…

A:

Q: Past records indicate that the probability of online retail orders that turn out to be fraudulent is…

A: Let X be the random variable from binomial distribution with probability (p) = 0.08 and sample size…

Q: A hospital wants to determine if the type of treatment for pneumonia is a factor in recovery time?…

A: Solution : Given :  Number of days to recovery for several randomly selected pneumonia patients that…

Q: Q2: The number of failures of a testing instrument from contamination particles on the product is a…

A: