The amount of time that a customer spends waiting at an airport check-in counter is a random variable with mean 8.0 minutes and standard deviation 1.7 minutes. Suppose that a random sample of a = 48 customers is observed. Find the probability that the average time waiting in line for these customers is (a) Less than 10 minutes (b) Between 5 and 10 minutes (c) Less than 6 minutes Round your answers to four decimal places (e.g. 0.9876). 1.1765 1.7647 (a) The probability is (b) The probability is i

Q: normalized so this is the case). What is the probability that a randomly selected group of 100…

A: Given: The average IQ of a population is 100 with standard deviation 15. sample size (n) = 100

Q: Suppose the mean income of firms in the industry for a year is 100 million dollars with a standard…

A: Given,mean(μ)=100Standard deviation(σ)=15

Q: Scores on the Wechsler Adult Intelligence Test are normally distributed with a mean of 100 and a…

A: Given:' Mean = μ=100 Standard deviation = σ= 10

Q: A leading magazine (like Barron's) reported at one time that the average number of weeks an…

A: The objective of this question is to find the probability that a sample of size n=58 is randomly…

Q: Suppose the age that children learn to walk is normally distributed with mean 12 months and standard…

A: GivenMean(μ)=12standard deviation(σ)=1.3sample size(n)=15

Q: The time that a skier takes on a downhill course has a normal distribution with a mean of 12.a…

A: The objective of this question is to find the probability of a skier taking less than 10 minutes and…

Q: For a standardized psychology examination intended for psychology majors, the historical data show…

A: From the provided information, Mean (µ) = 505 Standard deviation (σ) = 180 Let X be a random…

Q: The owner of a shop knows the number of customers coming to his shop in a day is a random variable…

A: mean = 23.7 sigma = 4.2 Let X represent the nu,ber of people coming to shop in a day

Q: Find the probability that the mean of this sample will be more than 130 between 120 and 125 between…

A: It is given that: Population Mean =μ= 120    Standard deviation = σ=18   Sample size =n= 64  Sample…

Q: Suppose that the average children learn to walk is normally distributed with a mean 12 months and…

A: Given Mean =12 Standard Deviation =2.5 Sample size (n)=34

Q: Suppose the age that children learn to walk is normally distributed with mean 11 months and standard…

A: GivenMean(μ)=11standard deviation(σ)=2.1sample size(n)=33

Q: Suppose that the monthly incomes of all employees in Firm A are normally distributed with a mean of…

A: Given: Let us define the random variable X as the monthly income of employees in firm A. Mean = μ =…

Q: Suppose the weight of linebackers in the National Football League (NFL) is normally distributed with…

A: Given,Mean, μ = 241 pounds.Standard deviation, σ = 4.0 pounds.Let X be a random variable represents…

Q: In 2000, the average height of a woman aged 20–74 years was 64 inches with an increase of…

A: Let X be the height of a woman aged 20-74 years which follows normal distribution with mean 64…

Q: Suppose IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What…

A:

Q: Assume that the average full time college student in the U.S. requires a total of $10,500 per year…

A: Given Mean=10500 Standard deviations=1300 n=50

Q: In a population of heroin users, the mean duration of heroin abuse is 5 years with a standard…

A: From the provided information, Mean (µ) = 5 years Standard deviation (σ) = 3 years X~N (5, 3) Sample…

Q: random sample of 100 individuals was taken from a population with a mean height of 170 cm and a…

A: Given that,The sample size is The population's mean height is  cmThe population standard deviation…

Q: Suppose that in a large population of women (aged 20 to 29-years-old) that the mean serum…

A: It is required to find the probability that a sample of 60 women aged 20 to 29-years-old from the…

Q: A recent survey suggests that the working residents of math city have an average commute of 35…

A: The objective of this question is to find the probability that the mean commute time of a sample of…

Q: Suppose the mean income of firms in the industry for a year is 30 million dollars with a standard…

A:

Q: The time that an Olympic skier takes on a downhill course has a normal distribution with a mean of…

A: The given values are:Mean (μ) = 85.5 secondsStandard deviation (σ) = 0.8 secondsLower limit (X1) =…

Q: Suppose the age that children learn to walk is normally distributed with mean 13 months and standard…

A: GivenMean(μ)=13standard deviation(σ)=2.1sample size(n)=34

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

A: given data μ=183000σ=34000n=65here sample size n≥30as per CLT we can say that distribution is…

Q: The acidity of human​ blood, measured on a pH​ scale, is a normal random variable with a mean of 7.4…

A:

Q: Assume that heights of U.S. men between 45 and 50 years of age are normally distributed with mean 70…

A: From the information, sample size is 49, mean 70 inches and a standard deviation of 0.75 inches

Q: Suppose the mean income of firms in the industry for a year is 100 million dollars with a standard…

A:

Q: The amount of atmospheric radiation to which a person is exposed to while flying by jet across the…

A: Standard normal distribution:The standard normal distribution is a special case of normal…

Q: Suppose the number of movies people rent per month is normally distributed with a mean of 4.8 and a…

A: Let x be the number of movies people rent per month which follows normal distribution with mean 4.8…

Q: A study shows that the intelligence quotient (IQ) of adults in a country follows a normal…

A: Given,mean(μ)=90standard deviation(σ)=4.5

Q: Suppose that a service centre finds that the time taken to resolve customer issues has a mean of 20…

A: It is given that μ=20 and σ=4.   The z score is calculated asz=x-μσ

Q: A recent study was conducted and it found that IQ's are normally distributed with a mean or 100 and…

A: Given information, μ=100σ=15

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 plasma cholesterol level (mg/dL) for patients who have not been diagnosed with heart disease and…

A: We have to find out given probability..

Q: Suppose the mean income of firms in the industry for a year is 25 million dollars with a standard…

A: Suppose the random variable x defines the income of firms in the industry.

Q: When soda is added to a 20-ounce cup first filled with ice, the actual amount of soda in the cup is…

A: We have given that,  Let X be random variable from normal distribution with mean (μ) = 11.1 and…

Q: When the individual weight of a parcel (500 pieces) of oranges was measured, it was observed that…

A: Given, Mean, mu= 200 Standard deviation, sigma= 25 X~N(200,25)  And n= 10/2 = 5  P(X<=150)