A manufacturer of power tools claims that the average amount of time required to assemble their top-of-the-line table saw is 80 minutes with a standard deviation of 40 minutes. Suppose a random sample of 64 purchasers of this table saw is taken. What is he probability that the sample mean will be less than 82 minutes?

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: A large population has a mean of 60 and a standard deviation of 8. A sample of 50 observations is…

A: GivenMean(μ)=60standard deviation(σ)=8sample size(n)=50

Q: A study of the amount of time it takes a mechanic to rebuild the transmission for a 2010 Chevrolet…

A: Concept of sampling distribution of sample mean: Let a particular characteristic of a population is…

Q: how much will the probability that the students are aged above 15 years old change?

A:

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 average life span of TV sets manufactured by Company X is 10.5 years. The standard deviation is…

A:

Q: Suppose the life spans of a particular brand of car battery are normally distributed with a mean of…

A: Given that  Mean=44.7 P(X>53.7)=0.26

Q: Suppose the scores, on a college entrance examination are normally distributed with a mean of 1000…

A: We have given that Suppose the scores, on a college entrance examination are normally distributed…

Q: In 1999, the murder rates (per 100,000) for the 50 states and the District of Columbia had a mean of…

A:

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 7.1 inches,…

A: Mean(µ) = 7.1Standard deviations (σ) = 2.2X ~ N (µ, σ )= N (7.1, 2.2)

Q: A researcher wishes to estimate the average height of men for a certain region of the country. If…

A: Probability is the measure determine the likelihood of an event. Event is the outcome of an…

Q: A population has a mean of 80 and a standard deviation of 7.A sample of 49 observation will be…

A:

Q: There is a large supply of light bulbs with the average life of 900 hours and the standard deviation…

A: It is given that the mean is 900 hours and the standard deviation is 60 hours.

Q: Suppose the age a student graduates from Salem State is Normally distributed. If the        mean age…

A: Given, mean = 23.1 Standard deviation = 3.1 We know, z = (x-mean)/std dev

Q: An electrical firm manufactures incandescent light bulbs that have a length of life (in hours) that…

A:

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 15 inches,…

A: Mean = 15 Standard deviation = 1

Q: A random sample of 25 observations yield a mean of 106 and a standard deviation of 12. What is the…

A: It is given that mean and standard deviation are106 and 12, respectively.By using central limit…

Q: A particular fruit's weights are normally distributed, with a mean of 452 grams and a standard…

A: Given: μ = 452 σ = 24 Thus, X ~ N(μ = 452, σ = 24) The probability that a randomly selected fruit…

Q: The height of 10 year old females is normally distributed with a mean of 54.8 inches and a standard…

A: It is given that mean and standard deviation are 54.8 inches and 2.74 inches, respectively.

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: Question 17 options:   1)  3.52 to 8.47   2)  4.69 to 7.31   3)  4.66 to 7.34   4)  4.33 to…

A:

Q: Suppose the scores, x, on a college entrance examination are normally distributed with a mean of…

A: Solution: Let X be the score on a college entrance examination. From the given information, X…

Q: A population has a mean of 80 and a standard deviation of 7. A sample of 49 survey will be taken.…

A: Given Data: Let X represent the random variable Mean=80 SD=7   n=49 M~ Normal(80,7249)

Q: A dean in the business school claims that GMAT scores of applicants to the school's MBA program have…

A: Solution To calculate probability we will use z distribution.

Q: To become an actuary, it is necessary to pass a series of 10 exams, including the most important…

A:

Q: probability that a patient recovers from a rare blood disease is 0.4. If 15 people are known to have…

A: Given problem is binomial distribution Let, X: Patient recovers from a rare blood disease p=Prob. of…

Q: At a large manufacturing company the mean age of workers is 37 years, and the standard deviation is…

A: When the given sample size is more, that means 30 are more than 30, then we use a large sample test.…

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.