Based on FAA estimates the average age of the fleets of the 10 largest U.S. commercial passenger carriers is 13.4 years with a standard deviation of 1.7 years. Suppose that 40 airplanes were randomly selected from the fleets of these 10 carriers and were inspected for cracks in these airplanes that are considered too large for flying. What is the probability that the average age of these 40 airplanes is at least 14 years old? Round your answer to 4 decimal places. Remember to round your z-value to two decimal places.

Q: If the daily wage of a worker in a large factory has an average of 180 usd, the standard deviation…

A: Given: mean: 180 usd, standard deviation: 5 usd, n = 75.The required probability is…

Q: A particular fruit's weights are normally distributed, with a mean of 513 grams and a standard…

A: The population mean is 513. The population standard deviation is 18. The sample size is 22. We have…

Q: The National Health and Nutrition Examination Survey (NHANES) reported that in a recent year, the…

A:

Q: The amount of annual snowfall in a certain mountain range is normally distributed with a mean of 70…

A: The provided information are: Population mean (μ) = 70 Population standard deviation (σ) = 10…

Q: The mean life of pairs of shoes is 40 months with a standard deviation of 8 months If the life of…

A: The random variable X is the life of shoes It is normally distributed. The mean life of the pair of…

Q: The time spent waiting in the line is approximately normally distributed. The mean waiting time is 5…

A: According to the given information, we have Mean = 5 minutes Standard deviation = 1 minutes

Q: Tiger Woods hits an average driver 287.2 yards with a standard deviation of 24.6 yards. What is the…

A: The probability value is calculate by means of standard normal variate with the random variable,…

Q: A particular fruit's weights are normally distributed, with a mean of 555 grams and a standard…

A: A particular fruit's weights are normally distributed, with a mean of 555 grams and a standard…

Q: A baseball team has 31 players, 8 of whom bat left-handed. Suppose that the manager of this team is…

A: A baseball team has 31 players, 8 of whom bat left-handed. Suppose that the manager of this team is…

Q: A particular fruit's weights are normally distributed, with a mean of 201 grams and a standard…

A:

Q: The life of light bulbs is distributed normally. The variance of the lifetime is 625 and the mean…

A: Given information- Population mean, µ = 570 hours Population variance, σ2 = 625 So, Population…

Q: The mean weight of an adult is 79 kilograms with a standard deviation of 10 kilograms. If 188…

A: Let  X be the random variable from normal distribution with mean (μ) = 79, standard deviation (σ) =…

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

A: We are given,μ = 196σ = 22n = 60

Q: The time spent waiting in the line is approximately normally distributed. The mean waiting time is 6…

A: Mean=M=6, Standard deviation=S=3X~N(M=6, S=3)

Q: Find the probability that the mean height of the sample is greater than 58 inches.

A: Assume that the height of adult females in the United States is approximately normally distributed…

Q: The average credit card debt for college seniors is $3262. If the debt is normally distributed with…

A: Let X be the random variable from normal distribution with mean (μ) = $3262 and standard deviation…

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: A particular fruit's weights are normally distributed, with a mean of 376 grams and a standard…

A: given data normal distributionμ = 376σ = 38P(315<x<357) = ?

Q: A final exam in Science 150  has a mean of 80 with a standard deviation of 8. If 25 students are…

A: Given: μ = 80 σ = 8 n = 25

Q: The life of light bulbs is distributed normally. The variance of the lifetime is 225and the mean…

A: The probability of a bulb lasting for at most 540 hours is calculated below:

Q: The time spent waiting in the line is approximately normally distributed. The mean waiting time is 7…

A:

Q: The lengths of lizards aged 2 to 8 years from an island in the pacific are approximately normal with…

A:

Q: The life of light bulbs is distributed normally. The standard deviation of the lifetime is 20 hours…

A: Denote X as the life of a randomly selected light bulb.

Q: A population has a mean of 75 and a standard deviation of 15 you randomly sample nine people from…

A: Given population have mean 75 and standard deviation 15. A sample of 9 people from the population is…

Q: loaded my die so that the chance of a 1 is 0.1, the chance of a 6 is 0.2, and the chances of the…

A: Use ∑P(x) =1   to find the remaining probability

Q: The body temperatures of all mosquitoes in a county have a mean of 57∘F and a standard deviation of…

A:

Q: The time spent waiting in the line is approximately normally distributed. The mean waiting time is 5…

A: Here, mean is 5 and standard deviation is 3. We will use z-standard normal distribution.

Q: The life of light bulbs is distributed normally. The standard deviation of the lifetime is 33 hours…

A: Answer: From the given data, Mean (μ) = 510 Standard deviation (σ) = 33 X~ Normal distribution (μ,σ)

Q: A racing car consumes a mean of 103 gallons of gas per race with a standard deviation of 6 gallons.…

A:

Q: . The level of blood glucose and diabetes in adults are related. Let X be a random variable measured…

A:

Q: The life of light bulbs is distributed normally. The variance of the lifetime is 225 and the mean…

A:

Q: The weight of all 5 pound bags of flour is Normally distributed with mean 5 pounds and standard…

A: Solution: Let X be the weight of all 5 pound bags of flour. From the given information, X follows…

Q: If there is an overall 120 movies, the mean is 109.408 And the standard deviation is 19.606. One of…

A: Approach to solving the question: Probability≈0.9963Sketch of Histogram: A histogram would represent…

Q: The time spent waiting in the line is approximately normally distributed. The mean waiting time is…

A:

Q: A professor knows that her statistics students' final exam scores have a mean of 79 and a standard…

A:

Q: Can you please write B up in writing as it is incorrect but I think it's because it's been converted…

A: f(x) = 3(x-1)^2, 0<x<1

Q: The life of light bulbs is distributed normally. The variance of the lifetime is 900 and the mean…

A:

Q: In a dorm, the weights of the students are normally distributed with mean 175 lbs and standard…

A:

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 12.3…

A: Given Information: Mean μ=12.3 years Standard deviation σ=0.8 years.   If you randomly purchase 3…

Q: Assume that the average weight of an NFL player is 245.7 lbs with a standard deviation of 34.5 lbs.…

A: Given μ=245.7σ=34.5n=32

Q: If an applicant is randomly selected, find the probability that the applicant's rating will be…

A: Let X denotes the applicant's ratings. Given that X follows N(mean = 200, SD = 50), then Z = (X -…

Q: he mean weight of all Goliath grouper caught on the Treasure coast is 377 pounds, with a standard…

A: The normal distribution  in the center are generally denser and basically less denser at tails.…

Q: The length of a ball pen is known to be normal with mean 5 inches with a standard deviation of 0.1…

A: Given: Population Mean (\mu)(μ) = 805 Population Standard Deviation (\sigma)(σ) = 1.70.1

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

A: Given data: Mean = 122000 Standard deviation  =41000 Sample size = 97

Q: University students' blood pressure can be expected to follow a normal distribution with a mean of…

A: