Suppose the exam results of course at a college are normally distributed with mean 55 and variation 25. If a student is selected at random, what is the probability that the student’s mark is between 58 and 65. Select one: 0.748497 0.977250 0.251503 0.892336 0.107664

Q: Assume that the square footage of a residential house in the US is normally distributed with a…

A: Let X be the random variable from normal distribution with mean (μ) = 1000 and standard deviation…

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: the golf scres for a team were normally distributed with a mean of 95 and a standard deviation of 6.…

A: We have find givan normal distribution..

Q: The weights of adult Great Dane are normally distributed with a mean of 100 lb and a standard…

A:

Q: 33% of the Population has 20/20 vision if 70 individuals are selected at random from the Population…

A: Sample size : n = 70P(20/20 vision) : p = 0.33x = Number of people with 20/250 visionMean of X :  =…

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

A:

Q: A hen lays a mean egg 309 eggs per year with a standard deviation is 12.7 eggs. The distribution can…

A: Given information- Sample size, n = 21 Population mean, µ = 309 eggd Population standard deviation,…

Q: The height of Christmas trees are normally distributed. The standard deviation of Christmas trees is…

A: Given: μ=1250 and σ=200   The z is calculated asz=x-μσ

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: Suppose one value is selected from a uniform distribution with a = 0 and b = 11. What is the…

A: Given: X~U(0,11) a=0 b=11

Q: he lengths of pregnancies are normally distributed with a mean of 268 days and a standard of…

A: mean=268 S.D=15

Q: the probability that a ball dropped from a certain height will strike the ground is 80 percent and…

A: Given: Number of trials or balls (n) = 12 Probability of success  here (p) = 0.80 Let X ~ Bin(12,…

Q: Suppose the grades in a mathematics class are Normally distributed with a mean of 75 and a standard…

A: Introduction :-  Here the grades in a mathematics class are Normally distributed with a mean of 75…

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: What is the probability of a sample mean being between z-values of -1.58 and 0.79?

A: We have to find  the probability of a sample mean being between z-values of -1.58 and 0.79?

Q: Suppose in a certain primary school, the weight of boys are normally distributed with mean 28kg and…

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

Q: The average age of all employees is 25 years, and the standard deviation of the ages of all…

A: Given,sample size(n)=100mean(μ)=25standard deviation(σ)=3

Q: Ava's morning routine is normally distributed and independent. She has been tracking her time from…

A: Let X and Y are the first and second mornings. It is given that X and Y are independent and…

Q: A rare form of malignant tumor occurs in 11 children in a​ million, so its probability is 0.000011.…

A: P = 0.000011 So, q = 1-p = 1 - 0.000011 = 0.999989N = 12441 Mean = N*P Standard deviation = √(NPq)

Q: Assume that the salaries of elementary school teachers are normally distributed with a mean $35,000…

A:

Q: High school girls average 80 text messages daily. Assume the population standard deviation is 15…

A: Given information:

Q: The service time for customers coming through a checkout counter has mean 128 seconds and standard…

A: Let, X=The service time for customers coming through a check out counter Given that X follows a…

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 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 average age of doctors in a certain hospital is 48.0 years old with a standard deviation of 5.0…

A: Given data,Mean μ=48standard deviation σ=5If n=32P(45<X<51)=?

Q: Suppose the horses in a large stable have a mean weight of 1354 lbs and a standard deviation of 98.…

A:

Q: 80% of beans seeds sprout. Three seeds were planted. Find the distribution of the variable X number…

A: Given : n = 3 P = 0.80 q = 1 - p     = 1 - 0.80 = 0.20

Q: A detergent company finds that a family in the country washes an average of 910 kilograms of clothes…

A: Given that: X is normal Distributed with mean µ = 910.0 and standard deviation σ = 85.0 By using…

Q: If the mean time is between unscheduled maintained of lcd displays in a hospital scan facility is…

A: We have given that λ = 1/4000 Let X is a random variable shows the time ofunscheduled maintenance.…

Q: A rare form of malignant tumor occurs in 11 children in a  million, so its probability is 0.000011.…

A: GivenA rare form of malignant tumor occurs in 11 children in a  million.Probability of malignant…

Q: A rare form of malignant tumor occurs in 11 children in a million, so its probability is 0.000011.…

A: The probability of occurrence of malignant tumour in a child (p) = 0.000011.Total number of children…

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

A:

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: The average number of dropouts for a school district has been 300 per year with a standard deviation…

A:

Q: Suppose you have a population of adult male basketball players and you know their mean height is 190…

A: For given data , Mean : μ=190cm standard deviation : σ=7.2 cm X=height of  adult male basketball…

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: Person 1 (X) = 1 hour, z = -0.5 Person 2 (X) = 3 hours, z= 0.5 Person 3 (X) = 4 hours, z= 1 4. Using…

A: The question is about normal dist. Given : Person 1 ( X ) = 1 hr. , z = -0.5 Person 2 ( X ) = 3 hr.…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.