re than 52 hours? the sample average is less than 47

Q: According to a survey, the average height of NBA players is 78 in. with a standard deviation of 7…

A: We have given that,  X is random variable are normally distributed with average or mean (mu) = 78…

Q: In the second quarter of 2015, the average movie ticket cost $8.61. In a random sample of 50 movie…

A:

Q: that the amount of time an Internal Revenue Service examiner is supposed to spend reviewing a…

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

Q: 2. We are given that the average height for women in America is 64 inches tall with a standard…

A: We have given that the random variable X i.e. height of the women. The Mean μ = 64 inches, standard…

Q: For a normally distributed population with a mean of 35 and a standard deviation of 7.5, if a sample…

A: From the given information,   Mean  = 35 Standard deviation = 7.5   The objective is to find the…

Q: The Boeing 727 airliner carries 200 passengers and has doors with a height of 72 inches. Heights of…

A: Use excel formula "=NORMDIST(72, 68.5, 2.4/SQRT(100), TRUE)" to find the probability. Answer:

Q: An electrical company claims that the average life of the bulbs it manufactures is 1 300 hours with…

A: According to central limit theorem if the population is normal or the sample size is at least 30,…

Q: A research firm conducted a survey to determine the average amount of money consistent smokers spend…

A: We have given that,  Let X be a random variable from normal distribution with mean(μ) = 20 and…

Q: A civil engineer takes a public ride going to his firm. The average time for his trip is 24 minutes,…

A: Given Information: Population mean (u) = 24 minutes Standard Deviation (s) = 3.80 minutes Target…

Q: The average public high school has 468 students with a standard deviation of 87. If a public school…

A: Given, mean=μ=468 and standard deviation=σ=87.

Q: According to the Nielsen Company the mean number of TV sets in a US household in 2013 was 2.24.…

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: The average length of actual running time (excluding advertisements) for television feature films is…

A:

Q: According to Neilson & Co adults watch an average of 30 hours of a TV a week. Assume the population…

A: It is given that the mean is 30 hours, the standard deviation is 12 and the sample size is 30.

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

A:

Q: According to the Bureau of Labor Statistics, the average number of weeks an individual is unemployed…

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: Since a population has a mean of 73.5 and a standard deviation of 2.5, what is the probability that…

A: We have to find given probability.....

Q: After many years of product car batteries testing, a company knows that the average life of a…

A: Solution: Let X be the life of a battery. From the given information, X follows normal distribution…

Q: A road averages 2,115 vehicles per day with a standard deviation of 485 vehicles per day. A traffic…

A:

Q: A veterinary researcher takes an SRS of 60 horses presenting with colic whose average age is 12…

A: Suppose a random sample of sufficiently large sample size drawn from a population whose mean is µ…

Q: Among all monthly bills from a certain credit card company, the mean amount billed was $485 and the…

A: Solution: a. Let X be the amount billed from a certain credit card company. From the given…

Q: the life expectancy of 400 people in a certain geographic region, the mean age at death was 70…

A: Given, μ=70σ=5.1n=50

Q: A certain car model has a mean gas mileage of 34 miles per gallon with a standard deviation 5 mpg. A…

A:

Q: The number of driving miles before a certain kind of tire begins to show wear is on the average of…

A:

Q: a certain population of the herring, Pomolobus aestivalis, the lengths of the individual fish are…

A: Let X be a random variable which indicates the length of the fish. Here it is given that- mean(μ)=54…

Q: A company produces boxes of candy that contain a mean of 50 candies each. The standard deviation is…

A: The normal distribution is the most useful theoretical distribution for continuous variables.…

Q: According to a report from a business intelligence​ company, smartphone owners are using an average…

A: Mean(μ)=22standard deviation(σ)=7sample size(n)=25

Q: A Nielsen Company report states that the mean number of TV sets in a U.S. household is 2.12. Assume…

A: Draw the normal curve and shade the area to the right of z=-0.1. Since the total area under the…

Q: 4. The average public elementary school has 468 students with a standard deviation of 87. If a…

A: Here use given step by step solution and normal distribution of sample mean

Q: 2. The number of hours spent playing video games a week by the residents of Minneapolis has a mean…

A: Answer -  Given mean μ = 10 hours   and Standard deviation σ = 13 hours                  Sample size…

Q: Traveling between two campuses via shuttle bus takes, on average, 28 minutes with a standard…

A:

Q: A civil engineer takes a public ride going to his firm. The average time for his trip is 24 minutes,…

A: The mean is μ=24 and the standard deviation σ=3.8 The office coffee time is 8:50 to 9:00 AM. So he…

Q: A recent study of the hourly wages of maintenance crew members for major airlines showed that the…

A: Given: μ=20.50σ=3.50 a. The probability the crew member earns between $20.50 and $24.00 per hour is…

Q: For a normally distributed population with a mean of 35 and a standard deviation of 7.5, if a sample…

A: Given,mean(μ)=35standard deviation(σ)=7.5sample size(n)=50

Q: According to Neilson & Co adults watch an average of 30 hours of a TV a week. Assume the population…

A: X~N(μ,σ2) μ=30, σ=12 Z=X-μσ/n

Q: Traveling between two campuses of a university in a city via shuttle bus takes, on average, 28…

A:

Q: 2. The average number of pages in a novel is 326 with a standard deviation of 24 pages. If a sample…

A: For a random variable X, with mean μ and standard deviation σ , the average of X =1n∑xii=1n =X¯…

Q: A Nielsen Company report states that the mean number of TV sets in a U.S. household is 2.24. Assume…

A: Obtain the probability that the number of TV sets is greater than 2 in that household. The…

Q: 4 Riley is a music DJ. So far, her average playing time per day is 5 hours, with a standard…

A: The random variable X follows normal distribution. We have to find the probability that on the next…

Q: A manufacturing plant has 500 employees with average age as 35 years with standard deviation of 9…

A: We have to find out given probabiity..

Q: mean = 71 kg, standard deviation = 13 kg, If 46 adults are randomly selected, what is the…

A: Given:  μ = ​71 kg σ = 13 kg n = 46

Q: According to an annual survey conducted by TheKnot.com, the mean cost of a wedding in 2017 was…

A: Given information: Mean=33, 391 Standard deviation=1500 a) The probability that a randomly selected…

Q: The time that a shopper spends in the grocery store is normally distributed, with a mean of 45…

A: Let X denote the  time that a shopper spends in the grocery store is normally distributed, with a…

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

A:

Q: What is the probability that a randomly selected participant will: Take between 2.15 and 2.25 hours…

A:

Q: The diameter of ping-pong balls manufactured by a French company is 1.57 inches with a standard…

A:

Q: According to a study, the average number of hours of TV viewing per household per week in the…

A: To find the probability that:   a.) The sample average is more than 52 hours   b.) The sample…

Q: We learned in Exercise 3.26 that about 90% of American adults had chickenpox before adulthood. We…

A: Given data,n = 120p=0.9X~Binomialn=120 , P=0.9

Q: A chemical manufacturer distributes its best product in chain stores. The average consumption of its…

A:

Q: Long distance telephone calls are normally distributed with a mean of 8 minutes and a standard…

A: Given that, Mean = 8 Standard deviation = 2

Q: According to the Department of Education, the time college students spend on their cell phones daily…

A: GivenMean(μ)=270standard deviation(σ)=75

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.