The average age of CEOS is 54 years. Assume the random variable is normally distributed. If the standard deviation is 4 years, find the probability that the a of a randomly selected CEO will be in the given range. Refer to the table of values ( Area Under the Standard Normal Distribution) as needed. Part: 0/2 Part 1 of 2 (a) Between 42 and 62 years old If a CEO is selected at random, the probability that he or she will be between 42 and 62 years old is

Q: Suppose that the walking step lengths of males are normally distributed with a mean of 2.5 feet and…

A: We have to find given probability.

Q: According to Money magazine, Maryland had the highest median annual household income of any state in…

A:

Q: The mean percent of childhood asthma prevalence in 43 cities is ​2.45%. A random sample of 34 of…

A:

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: A particular fruit's weights are normally distributed, with a mean of 722 grams and a standard…

A:

Q: An airline is studying the average length of time that each plane spends on the ground at an…

A: The mean of the sampling distribution of the sample mean is, The standard deviation of the sampling…

Q: Salaries for teachers in a particular elementary school district are normally distributed with a…

A: Let X be the salaries for teachers in a particular elementary school district are normally…

Q: Ages of Proofreaders At a large publishing company, the mean age of proofreaders is 36.2 years, and…

A:

Q: An insurance salesperson sells an average of 4.90 policies per day. Let x denote the number of…

A:

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

A: Given Information: Mean μ=80 Standard deviation σ=7 Sample size n=49

Q: The monthly rents for studio have a apartments in Abu Dhabi mean of AED 3400 and a standard…

A: GivenMean(μ)=3400standard deviation(σ)=400sample size(n)=25

Q: Lifetime of one model of lightbulb is normally distributed with a mean of 1900 hours and a standard…

A: Let X be the lifetime of one model of lightbulb. X has normally distributed with population mean( μ…

Q: For the normal distributions shown to the right, find the probability that an observation falls in…

A: P(X  >  = P(x -             = P( > 0.58)            = P(Z > 0.58)           = 1 - P(Z <…

Q: IQ is normally distributed with a mean of 100 and a standard deviation of 15. Suppose one individual…

A: let X: IQ X~N(μ,σ)where, mean(μ)=100    and standard deviation(σ)=15

Q: 10. A study has shown 38% of adults have purchased a product online. A random sample of 250 adults…

A:

Q: Question-1) The serum cholesterol levels of a certain population of boys have a mean of 170 mg/dl…

A: Mean()=170standard deviation()=30

Q: Cody took his first physics exam and scored an 80. The population mean for this exam is 70, and the…

A: Solution: It is given that, Population mean, 70 Standard deviation, 5 Given that Cody took his first…

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A: Let X = distance in feet for a fly ball. Use excel formula "=NORM.S.INV(0.8416)" to find the…

Q: Assume that adults have IQ scores that are normally distributed with a mean of μ=105 and a standard…

A: Let "X" be the IQ score of the adults.

Q: Suppose exam scores in statistics are normally distributed with a mean of 72 and a standard…

A: It is given that the exam scores follows normal distribution with mean 72 and standard deviation 8.

Q: If z is a standard normal variable, find the probability. The probability that z lies between -1.10…

A: We have to find the probability. The probability that z lies between -1.10 and -0.36.

Q: The average time it takes a music producer to complete a recording of a pop song is 53.4 minutes.…

A: Let X be the random variable from normal distribution with mean (μ) = 53.4, variance (σ2) = 49 the…

Q: Trucks in a delivery fleet travel a mean of 130 miles per day with a standard deviation of 39 miles…

A: The data on per day mileage of a delivery truck is normally distributed. Population mean, Population…

Q: A grocery​ store's receipts show that Sunday customer purchases have a skewed distribution with a…

A: From the provided information, Mean (µ) =29 Standard deviation (σ) = 21 Sample size (n) = 307 For…

Q: the length of time it takes college students to find a parking spot follows a normal distribution…

A: Given, μ=5 minutesσ=1 minutes

Q: The life of light bulbs is distributed normally. The standard deviation of the lifetime is 36 hours…

A: Answer: From the given data, mean(μ) = 500 standard deviation (σ) = 36 X~ Norma(500,36) at most 508…

Q: The average amount of snow per season in Trafford is  40  inches. The standard deviation is  4…

A:

Q: Full-time Ph.D. students receive an average of $12,837 per year. If the average salaries are…

A: Given information- Population mean, µ = $12,837 per year Population standard deviation, σ = $1500…

Q: Systolic Blood Pressure Assume that the mean systolic blood pressure of normal adults is 120…

A: From the provided information, Mean (µ) = 120 Standard deviation (σ) = 5.6 X~N (120, 5.6)

Q: Assume that females have pulse rates that are normally distributed with a mean of μ=74.0 beats per…

A: The mean is 74 and the standard deviation is 12.5.

Q: Private nonprofit four-year colleges charge, on average, $27,363 per year in tuition and fees. The…

A: Given information: μ=27363σ=6865 b) The probability that a randomly selected Private nonprofit…

Q: SAT test scores are normally distributed with a mean of 500 and a standard deviation of 100. Find…

A: Given: Let X be the SAT test scores Mean(X)=500 SD(X)=100   X~ Normal(500, 1002)

Q: The average age of a CEO is 60 years. Assume the random variable is normally distributed. If the…

A: The data on the age of CEOs is distributed normally.Population mean, Population standard deviation,

Q: 1Q scores have a population mean of 100, a population standard deviation of 15, and are…

A: It is given that IQ scores follows N (100, 15). The required probability is probability that a…

Q: Temperatures a city are distributed approximately normal, with a mean of 61 degrees fahrenheit and a…

A: Given data,Mean μ=61sd    σ=6P(X<70.5)=?

Q: Scores on a test are normally distributed with a mean of 78 and a standard deviation of 6. A student…

A: Given: Mean μ=78 Standard deviation σ=6 A student is selected at random.

Q: d. The probability that the wave will crash onto the beach between 0.2 and 3.3 seconds after the…

A:

Q: Finding the Mean, Variance, and Standard Deviation of a Binomial Distribution About 9% of the…

A: Solution : Given : n = 100            p = 0.09            q  = 1- p = 0.91For Binomial…

Q: a. Calculate the probability that the average number of minutes that diners spend at their table for…

A: Let X denote number of minutes that drivers spend at their table for dinner. Given that X follows…

Q: Solve the problem. Assume that mountain lions' weights are normally distributed with a mean of 62.6…

A: We have given that,  X be the random variable from normal distribution with mean (μ) = 62.6 ,…

Q: Ages of Proofreaders At a large publishing company, the mean age of proofreaders is 36.2 years, and…

A: Press 2ND and VARS Choose normcdf

Q: Mary drives to work each morning, and the trip takes an average of µ = 38 minutes. The distribution…

A: Given: µ = 38 minutes,  σ = 5 minutes. The Z follows standard normal distribution. Z=X-μσ

Q: Trucks in a delivery fleet travel a mean of 100 miles per day with a standard deviation of 38 miles…

A:

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A: The following information has been provided: Let X be a random variable represents the distance in…