The average employee in the U.S. spends m = 23 minutes commuting to work each day. Assume that the distribution of commute times is normal with a standard deviation of s = 8 minutes a.         What proportion of U.S. employees spends less than 15 minutes a day commuting? b.         What is the probability of randomly selecting an employee who spends more than 35              minutes commuting each day?

Q: According to one study, the average hours of sleep on a weeknight for men was 6.9 hours with a…

A:

Q: The lengths of pregnancies are normally distributed with a mean of 267 days and a standard deviation…

A: Refer Standard normal table/Z-table to find the probability of z=2.80.

Q: The average annual salary for all U.S. teachers is $47,750. Assume that the distribution is normal…

A: GivenMean(μ)=47750standard deviation(σ)=5680

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A:

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A:

Q: The average age of vehicles registered in the United States is 96 months. Assume the population is…

A: Given that: X is normally Distributed with mean µ = 96.0 and standard deviation σ = 15.0 By using…

Q: The weekly amount spent by an event management company for travel has approximately a normal…

A: From the provided information, Mean (µ) = $2500 Standard deviation (σ) = $400 Let X be a random…

Q: Major league baseball salaries are normally distributed with average 3.3 million with a standard…

A: Answer: From the given data, Suppose X: The salaries of major league baseball X follows a normal…

Q: A parachute company sells safety devices that are designed to fire, releasing the reserve parachute,…

A: σ=12.3,n=20s=8.9

Q: The Coffee Bean and Tea Leaf morning customer load follows a normal distribution with mean 46 and…

A: Solution

Q: Based on Aircraft Safety Council of Country PQR, an average of 18 aircraft accidents occurred each…

A: Given,an average aircraft accidents occurred each year is 18so an average aircraft accidents…

Q: What is the Mean deviation of the numbers 0.5, 0.8, 1.1, 0.9 and 0.6

A: The data is given by 0.5, 0.8, 1.1, 0.9, 0.6 And the mean of these numbers is Mean = (0.5 + 0.8 +…

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: Major league baseball salaries are normally distributed with average 3.3 million with a standard…

A: Given problem Given that   Major league baseball salaries are normally distributed with average…

Q: The lengths of pregnancies are normally distributed with a mean of 266days and a standard deviation…

A:

Q: The lengths of pregnancies are normally distributed with a mean of 266 days and a standard…

A:

Q: The number of automobile accidents per week in Toronto is normally distributed with a mean of 16.3…

A:

Q: The time until recharge for a battery in a smartphone is normally distributed with a mean of 250…

A: a. Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: he average number of minutes per week that teenagers spend texting is 240.0 . Assume the standard…

A: Given data, μ=240σ=72If n=64P(230<X<250)=?

Q: Data from the Bureau of Labor Statistics’ Consumer Expenditure Survey show that annual expenditures…

A: Given information- For the year 2001- Population mean, µ = $235 Population standard deviation, σ =…

Q: study indicates that​ 18- to​ 24- year olds spend a mean of 115 minutes watching video on their…

A:

Q: a. Find the probability of a pregnancy lasting 308 days or longer. b. If the length of pregnancy is…

A: Given Data Population Mean,μ = 269 Population Standard Deviation,σ = 15

Q: Assume the credit card balances of younger college educated employed persons are normally…

A:

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: The annual income for a sample of 450 part-time students is normally distributed with a mean income…

A: Given that.   X~N( μ , ?)   μ=31000 , ?=3000   Z-score =( x - μ )/?

Q: The lengths of pregnancies are normally distributed with a mean of 267 days and a standard deviation…

A: Given,mean(μ)=267standard deviation(σ)=15

Q: Suppose that we know that 33.8% of the people born in the United States between 1936 and 1951 have…

A:

Q: Traveling between University of Santo Tomas and Rizal Park, Manila via shuttle bus takes, on…

A: Let X be the transport time. From the given information, X has mean µ=28 minutes and a standard…

Q: The amount spent by a customer of Tasty Treat ltd has a normal distribution with a mean of 7.25…

A: GivenMean(μ)=7.25standard deviation(σ)=2.3

Q: The lengths of pregnancies are normally distributed with a mean of 267 days and a standard deviation…

A: The normal distribution is the bell shaped distribution which is centred at the mean. This is also…

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.