If a public school is selected, what is the z-value  that the number of students enrolled is greater than 400? 0.78 -0.78 0.76 none of these b. If a public school is selected, what is the probability  that the number of students enrolled is greater than 400?0.7823 0.7833 0.2177 0.2133 c. If a random sample of38 public elementary schools is selected, what is the probability that the number of students enrolled is between 445 and 485? 0.357 0.8849 0.8333 none of these

Q: Assume that women's heights are normally distrubuted with a mean of 63.6 inches and a standard…

A: From the given information, the mean is 63.6 and the standard deviation is 2.5.

Q: The average age of accountants is 53 years, with a standard deviation of 5 years. If an accounting…

A: We have to find probability..

Q: Assume that the heights of women are normally distributed with a mean of 64.1 inches And a standard…

A: Given: Population mean=μ=64.1. Population standard deviation=σ=2.3. The sample size is n=64.

Q: In a survey of a group of men, the heights in the 20, 29 age group were normally distributed with a…

A:

Q: The average age of a vehicle registered in Country A is 8 years, or 96 months. Assume the standard…

A:

Q: Traveling between two campuses of a university in a city via shuttle bus takes, on average, 31…

A: The given data are: Mean, μ=31 minutes Standard deviation, σ=5 minutes n=40 For sample average, z is…

Q: The average public high school has 468 students with a standard deviation of 87. If a public school…

A: Given, mean=μ=468 and standard deviation=σ=87.

Q: The probability that a patient recovers from a delicate heart operation is 0.85. What is the…

A: Here, p=0.85 and n=7. The general formula for SD is, SD=np1-p

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: Traveling between two campuses of a university in a city via shuttle bus takes, on average, 28…

A: P(X<30)=Pz<30-28540=P(z<2.53)=0.9943

Q: the weights of 8000 men follows a normal distribution with mean 67 kg. and the standard deviation 10…

A: We want to find probability for given data

Q: Suppose the average time spent driving for drivers age 20 to 24 is 25 minutes and you randomly…

A: It is given that mean and standard deviation are 25 and 1.5, respectively.By using central limit…

Q: The average age of a vehicle registered in the United States is 8 years, or 96 months. If a random…

A: Mean()=8 years=96 monthsstandard deviation()=15

Q: The net weight of a can of salmon is a random variable with a mean of 6.21 ounces and a standard…

A: Solution

Q: The lengths, in metres, of cars in a city are normally distributed with mean ? and standard…

A: Normal Distribution: A continuous random variable X is said to follow Normal distribution with…

Q: The heights of athletes at a college have mean 69.5 inches and standard deviation 3.3 inches. Find…

A: From the given information,   Mean= 69.5 Standard deviation = 3.3   The objective is to find the…

Q: A new species of rabbit has an average body length of 45mm with a standard deviation of 3mm. In a…

A: Given that the new species of the rabbit has an average body of 45mm, which means the mean is 45mm…

Q: The average age of accountants is 43 years, with a standard deviation of 5 years. If an accounting…

A: From the given information,   Mean = 43 Standard deviation = 5 Sample size = 30

Q: Assume the average weight of a schoolchild's book bag is 17.5 pounds, with a standard variation of…

A: Let X be a random variable that denotes the weight of the child's school bag. Then, it is provided…

Q: goods

A: Let X be the random variable such that  cholesterol content of a certain canned goods. The average…

Q: An elevator has a weight capacity of 2000 pounds. Assume the weights of us men have a mean of 190…

A: The probability the elevator will be over capacity is obtained below:From the given information X…

Q: Suppose the average age of a Tulane undergraduate is 20 years with a standard deviation of 1.2…

A:

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

A: The average weight of an NFL player is 245.7 pounds with a standard deviation 34.5 pound. That is,

Q: An electrical firm manufactures light bulbs that have a length of life that is normally distributed…

A:

Q: The average age of managers is 40 years. Assume the variable is normally distributed. If the…

A: Given data,μ=40σ=5P(35<X<46)=?

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

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

Q: A certain brand of car tends to break down on average after 115,000miles with a standard deviation…

A: The objective of this question is to find the probability that the average breakdown mileage of a…

Q: A certain brand of automobile tire has a life expectancy that 1e normally dietribute with a mean of…

A: Solution: Let X be the life expectancy of automobile tire has normal distribution with mean…

Q: Suppose the teenagers that attend public high schools get an average of 5.7 hours of sleep each…

A: Mean service life is 5.7 and a standard deviation is 1.7.  Sample size 35.

Q: The probability that a person catches a cold during the cold and flu season Is 0.4. Assume that 10…

A: Given data, p=0.4 n=10 sd=?