In a population of children at a local elementary school, the average number of sick days taken per year is 6 with a standard deviation of 3. Assume that this distribution is normal. For random samples of size 125, what is the probability that a sample mean for sick days would be 7 or greater?

Q: Suppose that in a certain large city, the mean 100 meter dash time for male high school seniors was…

A:

Q: A machine produces bolts with an average diameter of 0.35 in. and a standard deviation of 0.02 in.…

A: It is given that the mean is 0.35 and the standard deviation is 0.02.

Q: . A random variable X is normally distributed with a mean of 25 and a standard deviation of 5. What…

A: A random variable X is normally distributed with a mean of 25 and a standard deviation of 5.

Q: A worldwide organization of academics claims that the mean IQ score of its members is 115, with a…

A: mean IQ score of its members is 115 standard deviation of  16 A randomly selected group of 35…

Q: In a population of high school boys, the mean number of girls dated over a four year period is 19.6,…

A: As per bartleby guideline expert have to answer first three subparts only dear student please upload…

Q: A computer instructor found out that on average, his students complete their modules in 120 hours…

A: Given: μ=120 hoursσ=10 hours

Q: The average score of freshmen on an aptitude test at a certain university is 540, with a standard…

A: Solution-: Given: μ=540,σ=50, nx=32,ny=50 We want to find , (a) P(differ in their average scores by…

Q: nufacturer knows that their items have a normally distributed length, with a mean of 10.6 inches,…

A: Given data,Mean μ=10.6sd  σ=2P(X<10.4)=?

Q: A population with a mean of 1,200 and a standard deviation of 480 is known to be highly skewed to…

A:

Q: Suppose the population of all public Universities shows the annual parking fee per student is…

A: Let X be the annual parking fees per student. It is given that  X~N(110, 18) For a random sample of…

Q: In 2000, the average height of a woman aged 20–74 years was 64 inches with an increase of…

A: Let X be the height of a woman aged 20-74 years which follows normal distribution with mean 64…

Q: Suppose the salaries of a company that pays to its employees are normally distributed with an…

A:

Q: s that their items have a normally distributed length, with a mean of 11.5 inches, and standard…

A: According to the sum, A manufacturer knows that its items have a normally distributed length, with a…

Q: The average life of a bread-making machine is 8 years, with a standard deviation of 2. Assuming that…

A: From the provided information, Mean (µ) = 8 years Standard deviation (σ) = 2 years Let X be a random…

Q: A Manufacturer knows that their items have a normally distributed length, with a mean of 15.1…

A: Here, the random variable follows a normal distribution with µ= 15.1 , σ=  4.4.

Q: In a very large university, the heights of the male students are approximately normally distributed…

A: Given: Meanmale = 175, S.DMale = 20 MeanFemale = 165, S.DFemale = 15 Male and Female student's…

Q: A farmer has a flock of 100 chickens with weights that are normally distributed with a mean of 5.00…

A: the probability that the mean weight of the group of nine chickens is greater than 5.10 pounds =…

Q: Suppose the salaries of a company that pays to its employees are normally distributed with an…

A: Given that the salaries of a company that pays to its employees are normally distributed with an…

Q: Suppose it is known that in a certain large human population cranial length is approximately…

A:

Q: For all of the California Community Colleges, the population of full-time faculty members have a…

A: According to the given information, we have Given that the ages of full-time faculty members is…

Q: a. If a male passenger is randomly​ selected, find the probability that he can fit through the…

A: u = 69 s = 2.8

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 12.4…

A:

Q: se that the birth weight of children follows a normal distribution with a mean of 3.0 kg and…

A: Given: μ=3.0, σ=0.5 The corresponding z-value is calculated as: The probability that the sample…

Q: A manufacturer knows that their items have a lengths that are approximately normally distributed,…

A: Central Limit Theorem for mean: If a random sample of size n is taken from a population having mean…

Q: f a pipe’s diameter exceeds 24 inches, it is useless to a buyer. A buyer receives a shipment of 10…

A:

Q: The distribution of heights for women in the United States is approximately normal, with a mean of μ…

A: Where,

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 5.6 inches,…

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: A population has a standard deviation of 16. If a sample of size 64 Is selected from this population…

A: Given Information: Standard deviation (s) = 16  Sample size (n) = 64  Sample mean - Population mean…

Q: Find the probability that, when playing 100 games, the player will win more than $5 on average.…

A: The following information has been provided: μ=4, σ=0.583\mu = 4, \text{ } \sigma = 0.583

Q: Suppose the salaries of a company that pays to its employees are normally distributed with an…

A:

Q: While checking receipts at Reds, it was determined that the average amount spent on food per table…

A:

Q: calculus class has stated that, historically, the distribution of final exam grades in the course…

A: As per bartelby guideline expert have to answer first three subparts only dear student please upload…

Q: Suppose that a junior partner in a law firm in the Philippines earns an average of 150,000 pesos per…

A:

Q: How large a random sample is required from a popu-lation whose standard deviation is 4.2 so that the…

A:

Q: In 2000, the average height of a woman aged 20–74 years was 64 inches with an increase of…

A: Given that: X is normal Distributed with mean                   µ = 64.0 and standard deviation σ =…

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: Suppose that the amount of time that shoppers wait in line to enter a store is normally distributed…

A: From the given information,   Mean = 70 Standard deviation = 5 Sample size = 25

Q: f 12 items are chosen at random, what is the probability that their mean length is less than 11.4…

A: Items have normally distributed length with mean 11.6 inches and standard deviation as 2.1 inches. X…

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

A:

Q: The manager of a restaurant believes that waiters and waitresses who introduce themselves by telling…

A:

Q: A simple random sample of the age of 8 employees of a corporation is recorded. Assume that the…

A:

Q: Suppose it is known that the average score of all high school seniors taking a national test of…

A:

Q: The monthly electric bill for all Great Lakes Electric Company are known to be distributed as a…

A: Given that  The monthly electric bill for all Great Lakes Electric Company are known to be…

Q: | The mean annual income of a worker in a certain professional category is 7) $40,000, with a…

A: The random variable annual income follows normal distribution. We have to find the probability that…

Q: The incomes of a certain large population of electricians follow a Normal distribution with mean…

A: It is given that the mean is 60,000 and the standard deviation is 6,000.

Q: Suppose that the mean value of the interpupillary distance for all adult males is 65 mm, and the…

A: (1) The probability that the same average distance for these 25 scores will be between 64 and 67 is,…

Q: Suppose the annual savings (in millions of euros) of a specific household is a random variable,…

A: Given: n=16, μ=5 and σ=1.…

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.