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 1.3 minutes. Suppose that a random sample of n = 45 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). (a) The probability is (b) The probability is i (c) 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: 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 number of students in a class for the Business Statistics program at a University has a…

A: Given Mean=23 Standard deviations=4.3 n=15

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: A federal study showed that 63.8%of occupants involved in a fatal car crash wore seat belts. Ofthose…

A: Define the events: E : Event that the occupant was ejected from the vehicle A: Event that the…

Q: The average weekly income of a U.S. student worker is $200 with a standard deviation of 50. If a…

A: The given values are, sample size = n = 100 standard deviation = σ = 50 mean = μ = 200 P ( -20 <…

Q: A veterinary researcher takes an SRS of 60 horses presenting with colic whose average age is 12…

A: Option b is the correct answer.

Q: The manager of a new coffee shop is collecting information for how often cars arrive at its…

A: Given information- We have given a Poisson distribution. We have given that the manager has counted…

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

A:

Q: The average time required to complete an accounting test has been determined to be 55 minutes with a…

A: We assume the data is normally distributed.

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

A: From the provided information, Mean (µ) = 500 Standard deviation (σ) = 170 X~N (500, 170) Here X be…

Q: The taxi and takeoff time for commercial jets is a random variable x with a mean of 8.6 minutes and…

A: Given  X~ N(8.6,3.4^2) We want to find the probability by using standard normal table

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

A:

Q: se a normal approximation to find the probability of the indicated number of voters. In this​ case,…

A:

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

A: Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

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

A: As the sample size is higher than 30, the distribution can be assumed as normal (as per the central…

Q: fertility rate is the number of births per 1000 women aged 15-44. The mean fertility rate of the 50…

A: According to the given information in this question We need to find the following probability

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

A: Given that  Mean = 515  Standard deviation = 170 Sample size = 35

Q: The annual salary for an emergency room nurse is a normally distributed random variable with a mean…

A: Mean()=80000standard deviation()=12000sample size(n)=36

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: The time taken in the cycling phase of a triathlon has a mean 23.16min and standard deviation…

A: The objective of this question is to find the probability that the mean cycling time taken by a…

Q: About ​80% of all female heart transplant patients will survive for at least 3 years. Seventy female…

A: Given information Probability that female heart transplant patients will survive for at least 3…

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 that the duration of a particular type of criminal trial is known to have a mean of 24 days…

A: Given that : The mean duration of a particular type of criminal trial ( µ ) = 24 days The standard…

Q: The time taken in the cycling phase of a triathlon has a mean 23.16min and standard deviation…

A: The objective of this question is to find the probability that the mean cycling time taken by a…

Q: The weights of ice cream cartons are normally distributed with a mean weight of 11 ounces and a…

A: Given : μ=11 ounceσ=0.6 ounceX~N(μ=11,σ2=0.62)Let, for sample of size n,x¯~Nμx¯=μ,σx¯2=σn2

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: A waitress keeps track of the tips she earns and knows that her mean tip is 15% with a standard…

A: We have been given that a waitress keeps a track of the tips that she earns and knows that her mean…

Q: The high temperature X (in degrees Fahrenheit) on January days in Columbus, Ohio, varies according…

A: Given data,μ=21σ=10P(15<X<25)=?

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

A: μ = 505σ = 170n= 40P(x¯≥528) = ?      here n>30, as per CLT sampling distribution will be normal.…