A major application of analytics in marketing is determining customer retention. Suppose that the probability of a long-distance carrier's customer leaving for another carrier from one month to the next is 0.14. What is the standard deviation?

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

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Q: In a recent study, the Centers for Disease Control and Prevention reported that the diastolic blood…

A: Solution: Let X be the diastolic blood pressure of adult men. From the given information, X follows…

Q: In an article about the cost of health care, Money magazine reported that a visit to a hospital…

A: The mean of the cost of the sore throat is $328. The standard deviation of the cost of the sore…

Q: A newsvendor wants to achieve a 0.975 in-stock probability. Demand is normallydistributed with a…

A: Introduction: A continuous probability distribution that is symmetrical on both sides of the mean is…

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: For a population With a mean of 75 and a standard deviation of 12, what is the probability that a…

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Q: The Economic Policy Institute periodically issues reports on wages of entry level workers. The…

A: As per our guidelines, we are allowed to answer first three sub-parts only. Thanks   a) What is the…

Q: The average number of acres burned by forest and range fires in a large New Mexico county is 4,300…

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Q: Consider a gamble with a 40% chance of winning $10 and a 60% chance of losing $10. What is the…

A: Given data: The given chance of winning is P(W)=40%=0.40. The given chance of losing is…

Q: A pharmaceutical company claims that a drug is effective in treating 90% of people having severe…

A: It is given that the random variable follows a binomial distribution with n=6 and p=0.9.

Q: The Economic Policy Institute periodically issues reports on wages of entry level workers. The…

A: From the given data: Standard deviation for male = $2.30 Standard deviation for female = $2.05

Q: A study indicates that​ 18- to​ 24- year olds spend a mean of 120 minutes watching video on their…

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

Q: If the mean height of a population of students is 68 inches with standard deviation 3 inches, what…

A: Given that      The mean height of a population of students is 68 inches with standard deviation 3…

Q: In a recent study, the Centers for Disease Control and Prevention reported that the diastolic blood…

A: Given that, Mean, mu= 80.5 And standard deviation, sigma= 9.9 X~ N(80.5, 9.9) We know that, z score…

Q: Assume that the traffic to the web site of Smiley’s People, Inc., which sells customized T-shirts,…

A: Note: Please repost part d as i can answer only 3 subparts as per my policy. Given data,Mean μ=4.56…

Q: the breaking of a particular rope is normally distributed, with the mean of 350 lbs. and a standard…

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Q: A pharmaceutical company claims that a drug is effective in treating 90% of people having severe mig…

A: Given information: The percentage of people having severe migraine headaches is 90%. That is, p=0.90…

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

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Q: The weight of football players is normally distributed with a mean of 180 pounds and a standard…

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

A: Provided information is ; Let X be the monthly utility bill mean(μ) = 100 standard deviation(σ)=15…

Q: The lifespan of a laptop battery is normally distributed. If the mean lifespan of a battery is 4…

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Q: Suppose the probability a patient will recover from a disease following medication is 0.7. In a…

A: Given : the probability a patient will recover from a disease following medication is 0.7.  In a…

Q: The number of people in a department store is normally distributed with a mean of 85 and a standard…

A: We have to find the solution for the given problem.

Q: According to government data, the probability that a woman between the ages of 25 and 29 was never…

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Q: A final exam in science 160 has a mean of 73 with a standard deviation of 7.8. If 25 students are…

A: Given information- Population mean, µ = 73 Population standard deviation, σ = 7.8 Sample size, n =…

Q: In its Fuel Economy Guide, the Environmental Protection Agency gives a variety of data on 2016 model…

A: Note: Hey, since there are multiple subparts are posted, we will answer first three subparts for…

Q: Rivers Casino did an audit of all of their blackjack tables and found that the amount of money…

A: According to the provided information, μ=$6000σ=$200

Q: The average hourly sale of a certain ride in an amusement park is P148.75/hr with a standard…

A: Given information- Population Mean µ = P148.75/hr Standard deviation (σ) = P75.76 Let X be the…

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

A: Given Information: Mean = 8.4 Standard Deviation = 1.8 n = 40

Q: A study indicates that 18- to 24- year olds spend a mean of 120 minutes watching video on their…

A: Given that, Mean = 120 Standard deviation = 20

Q: A civil engineer takes a public ride going to his firm. The average time for his trip is 24 minutes,…

A: The mean is μ=24 and the standard deviation σ=3.8 The office coffee time is 8:50 to 9:00 AM. So he…

Q: The average resident of Metro City produces 770 pounds of solid waste each year, and the standard…

A: We have to find probability

Q: Assume you have a binomial distribution. In an experiment with 100 trials and a probability of a…

A: Given that, n=100 p=1/2 =0.5 Standard deviation=?

Q: The probability is 5​% that a student taking the test scores higher than

A: Let X denote the scores of final examination in an introductory statistics course. Given that X…

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

A: The Z-score of a random variable X is defined as follows: Z=(X–µ)/σ Here, µ and σ are the mean and…

Q: a

A: Given data: Mean cost of money magazine is $328, standard deviation of the magazine is $92. To find:…

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

A: Central Limit Theorem for mean: If a random sample of size n is taken from a population having mean…

Q: assume that cans of coke are filled so that the actual amounts have a mean of 12 oz and a standard…

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Q: A study indicates that 18- to 24- year olds spend a mean of 120 minutes watching video on their…

A: Assume that the amount of time watching video on a smartphone per month is normally distributed and…

Q: In a biomedical research study, it was determined that the survival time, in weeks, of an animal…

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

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Q: According to the American Time Use Survey results released by the Bureau of Labor Statistics on June…

A: Given : μ = 168 , σ= 20 and n= 400       By Central Limit Theorem, x̅ follows a Normal…

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

A: From the provided information, Mean (µ) = 57 Standard deviation (σ) = 3.5 Let X be a random variable…

Q: A set of scores in Statistics examination is approximately normally distributed with a mean of 74…

A: Given: The value of mean is, μ=74. The value of standard deviation is, σ=7.9. The objective is to…

Q: A study of the amount of time it takes to rebuild the transmission for a 2005 Chevy Cavalier shows…

A: Given information- Population mean, µ = 8.4 hours Population standard deviation, σ = 1.8 hours We…

Q: Traveling between University of Santo Tomas and Rizal Park, Manila via shuttle bus takes, on…

A: Solution: Let X be the transport time. From the given information, X has mean µ=28 minutes and a…

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

A:

Q: a distribution with a mean of 100 and a standard deviation of 15, what is the probability that a…

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