In a survey of MBA students, 70% said that they expect to be promoted within a month after receiving their degree. If this proportion holds for the population, find , for a sample of size 15, the probability that the number of expecting a promotion within a month after graduation is a. at least 7 b. not more than 5 c. between 6 and 9 inclusive d. Calculate the Mean and Standard Deviation

Q: The examination results of a large group of students in statistics are approximately normally…

A: Formula : Z =(X - μ)/σ

Q: Given a normal distribution with a mean of 150 and a standard deviation of 10, what is the…

A: Given,   Mean = 150 Standard deviation = 10

Q: Assuming that the scores of the student in a test are normally distributed with the mean of 40 and…

A: We have given that  Mean(µ) = 40Standard deviations (σ) = 6X ~ N (µ, σ )= N(40, 6)

Q: 8. The reading speed of sixth-grade students is approximately normal, with a mean speed of 135 words…

A:

Q: Based on previous studies of school children who were vaccinated and contracted the flu, the time in…

A: As per our guidelines we can solve first multiple-choice question and rest can be reposted.…

Q: Assuming that the group of students with a grade arithmetic mean of 70 and a standard deviation of…

A:

Q: Find the probability that the value of an item drawn at random from a normal distributiontion with…

A:

Q: The manager of a computer help desk operation has collected enough data to conclude that the…

A: Given, Mean = μ = 8.21 Standard deviation = σ = 2.14 Sample size = n = 40 The x is normally…

Q: (d) What is the probability that the number of drivers will be within 2 standard deviations of the…

A: Let X=the number of drivers X follows a Poisson distribution with mean= 20 So the standard…

Q: A survey showed the following probabilities of having X number of dogs per household X = number 1 3…

A:

Q: Suppose that people heights (in centimeters) are normally distributed, with a mean of 170 and a…

A:

Q: A Harris poll claims that each person in the US will spend an average of $92.12 on Halloween this…

A: Given :  A Harris poll claims that each person in the US will spend an average of $92.12 on…

Q: Given a normal distribution (X) with mean = 100 and standard deviation (σ) = 10,  w hat is the…

A: X follows a Normal distribution with mean = 100 and S.D = 10 Then z=(x-mean)/SD = (x-100)/10…

Q: Given a distribution that has a mean of 37 and a standard deviation of 12, calculate the probability…

A:

Q: Assume that the salaries of elementary school teachers in the United States are normally distributed…

A: Given: μ=32000, σ=3000, n=100 The corresponding z-value needed to be computed is:

Q: The lifespan of a laptop battery is normally distributed. If the mean lifespan of a battery is 4…

A:

Q: Suppose the heights of 18-year-old men are approximately normally distributed, with mean 69 inches…

A:

Q: c. What fraction of babies is more than 1.5 standard deviations from the mean in either direction?…

A: Given,

Q: The daily number of eggs produced by an egg processing machine is normally distributed with a mean…

A:

Q: The spending at Target is distributed normally with a mean spending of $47.67 and a standard…

A:

Q: Given a normal distribution (X) with mean = 100 and standard deviation (σ) = 10, w hat is the…

A: Let X be the random variable and it follows the normal distribution with mean μ and standard…

Q: If the average yield of a dunum of yellow corn is 800 kg, with a standard deviation of 40 kg, and…

A: Given that : X follow a normal distribution with mean (μ) 800 kg and standard deviation (? ) 40 kg.…

Q: Regardless of the kind of workout a gym goer does, the mean time spent on the treadmill is 44…

A:

Q: chickens follow a normal distribution with a mean of ? kg and a standard deviation of ? kg. It is…

A: *Answer:

Q: The average individual monthly spending in the United States for paging and messaging services is…

A: Suppose a random variable X has mean µ and standard deviation σ. Therefore, the z-score of that…

Q: Most exhibition shows open in the morning and close in the late evening. A study of Saturday arrival…

A: From the provided information, Mean (µ) = 2 hours and 2 minutes or 122 minutes Standard deviation…

Q: The volume of cracker boxes are normally distributed, with a mean of 7 oz and a standard deviation…

A: It is given that:

Q: A commuter must pass through five traffic lights on her way to work and will have to stop at each…

A:

Q: (a)    It has been reported that the length of human pregnancies from conception to birth…

A: a)GivenMean(μ)=266standard deviation(σ)=16

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

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

Q: Ten years after graduation, the salaries of Heriot-Watt University graduates are Normally…

A: Given that.   X~N( μ , ?^2 )   μ=55000    , ?=11000   Z-score =( x - μ )/?

Q: A normal distribution has a mean of u=54 and a standard deviation of o=6, what is the probability of…

A: Mean = 54 Standard deviation = 6 Sample size, n = 36

Q: Assuming that student incomes from employment in industry during the day are normally distributed…

A:

Q: The lifetime of a computer circuit board is normally distributed with a mean of 2,500 hours and a…

A:

Q: The probability that an individual has​ 20-20 vision is 0.16. In a class of 37 ​students, what is…

A: As per guideline expert have answer first question only dear student please upload other question…

Q: In your school with 400 Grade 11 students, the final examination in General Mathematics has a mean…

A: From the provided information, Mean (µ) = 38 Standard deviation (σ) = 4 X~N (38, 4) Here X be a…

Q: The annual income of residence in certain county is normally distributed with a mean of $42,000 and…

A: The probability that a randomly chosen resident has income over $52,000 is 16% and it is calculated…

Q: Given a normal distribution (X) with mean = 100 and standard deviation (σ) = 10,  w hat is the…

A: Given data,μ=100σ=10P(X<81)=?

Q: The sample mean and sample standard deviation of all San Francisco student scores on the most recent…

A:

Q: A private entity has recorded that the population average of unemployed persons per year in a city…

A: Probability:          Let the total number of possibilities be n and the number of…

Q: In​ 2008, the per capita consumption of soft drinks in Country A was reported to be 19.28 gallons.…

A:

Q: According to a survey of the top 10 employers in a major city in the Midwest, a worker spends an…

A:

Q: If the value of goods declared by all Canadians returning to Canada at the Pigeon River border…

A: According to guidelines we solve first question when given questions are different.

Q: A statistical analysis of a very large sample of fully-assembled medical devices indicates that the…

A:

Q: The average amount of Vitamin C in a capsule of a multivitamin is 500 mg and the standard deviation…

A:

Q: The Aluminum Association reports that the average American uses 56.8 pounds of aluminum in a year. A…

A: It is given that the mean is 56.8 and standard deviation is 12.3.

Q: Assume the mean and standard deviation of sample returns are 8% and 10% respectively. Assuming that…

A: X has normally distributed. X~N(μ,σ) μ=8%=0.08 and σ=10%=0.10 find P(X<0.08)=?

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

A: Given information is Mean annual salary(μ)=$178000standard deviation(σ)=$39000random sample(n)=36

Q: The volume of cracker boxes are normally distributed, with a mean of 7 oz and a standard deviation…

A: It is given that:

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.