The times that college students spend studying per week have a distribution that is skewed to the right with a mean of 8.9 hours and a standard deviation of 2.4 hours. Find the probability that the mean time spent Studying per week for a random sample of 45 students would be  between 8.5 and 9.3 hours  less than 8.5 hours

Q: Assume that the height of people, measured in inches, has a normal distribution with a mean of 65…

A:

Q: In an all boys school, the heights of the student body are normally distributed with a mean of 68…

A:

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

A:

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: Traveling between two campuses of a university in a city via shuttle bus takes, on average, 31…

A: The given data are: Mean, μ=31 minutes Standard deviation, σ=5 minutes n=40 For sample average, z is…

Q: A local sports magazine reports the mean length of a baseball game to be 175.9 minutes with a…

A:

Q: Most graduate schools of business require applicants for admission to take the GMAT exam. Suppose…

A: The random variable is score on the GMAT. It follows standard normal distribution. The population…

Q: On the distant planet Cowabunga , the weights of cows have a normal distribution with a mean of 397…

A:

Q: A student finds that the average price of a movie ticket in Washington is $12.25 and that the…

A: From the provided information, Mean (µ) = $12.25 Standard deviation (σ) = $2 Let X be a random…

Q: On the distant planet Cowabunga , the weights of cows have a normal distribution with a mean of 435…

A:

Q: In a recent study, the Centers for Disease Control and Prevention reported that the diastolic blood…

A: Given that, Mean, mu= 80.5 And standard deviation, sigma= 9.9 X~ N(80.5, 9.9) We know that, z score…

Q: Of all the companies on the New York Stock Exchange, profits are normally distributed with a mean of…

A: Given data: Mean = $6.54 million Standard deviation = $10.45 million Sample size  = 73 To find: what…

Q: A researcher showed the mean of weights of college football players to be 200 pounds with a standard…

A:

Q: The golf scores for a school team were normally distributed with a mean of 72 and a standard…

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 SICK-LEAVE TIME OF EMPLOYEES IN A FIRM IN A MONTH IS NORMALLY WITH A MEAN OF 100 HOURS AND A…

A:

Q: A local sports magazine reports the mean length of a baseball game to be 175.9 minutes with a…

A: Given, mean, μ= 175.9 minutes standard deviation,  = 27 minutes n = 30

Q: In Turkey, the time devoted to the sport of university students for 30 minutes daily. average and 3…

A: Since you have asked question with multiple sub parts, we will solve first 3 sub parts for you. To…

Q: The heights of students are normally distributed with a mean of 59 inches and a standard deviation…

A:

Q: An electrical company claims that an average life of bulbs it manufactures is 1200 hours with a…

A: Given that : μ= 1200 hour  ? = 250 hours  n = 100 By using the central limit theorem we solve this…

Q: At a customer service call center for a large company, the number of calls received per hour is…

A:

Q: On the distant planet Cowabunga, the weights of cows have a normal distribution with a mean of 605…

A:

Q: A professor at a university gives her large class an examination and finds that the scores follow…

A:

Q: A set of final examination grades in an introductory statistics course is normally​ distributed,…

A: We have to find given probability..

Q: On the distant planet Cowabunga , the weights of cows have a normal distribution with a mean of 424…

A:

Q: If we know that the length of time it takes a college student to find a parking spot in the library…

A: Consider a random variable X which, follows normal distribution, indicates the time to find a…

Q: Suppose the area that can be painted using a single can of spray paint is slightly variable and…

A: It is given that the area that can be painted using a single can of spray paint has a normal…

Q: What is the probability that the workers received a salary higher than or equal to ₱575 per day?

A: According to the study, the mean salary of the workers in Metro Manila is ₱550 per day with a…

Q: The average person uses 130 gallons of water daily. If the standard deviation is 35 gallons , find…

A: Given that, Mean = 130 Standard deviation = 35 Sample size = 25

Q: The diameter of a brand of tennis balls is approximately normally distributed with a mean of 2.5…

A:

Q: The head of maintenance at XYZ Rent-A-Car believes that the mean number of miles between services is…

A: Given data normally distributed with mean of 3290 miles and standard deviation of 384 miles.

Q: On the distant planet Cowabunga , the weights of cows have a normal distribution with a mean of 526…

A:

Q: The distribution of the number of viewers for the American Idol television show follows a normal…

A:

Q: In a recent study, the Centers for Disease Control and Prevention reported that the diastolic blood…

A: given that mean(μ)= 80.5 standard deviation (σ) = 9.9

Q: The life of an electronic transistor is normally distributed, with a mean of 500 hours and a…

A:

Q: On the distant planet Cowabunga , the weights of cows have a normal distribution with a mean of 530…

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: An electrical company claims that the average life of the bulbs it manufactures is 1200 hours with…

A:

Q: According to the US energy administration, the mean monthly household electric bill in the united…

A:

Q: The grades in a standardized test have a mean of 78, a known standard deviation of 8, and are…

A: Given:

Q: In a recent year, grade 7 Maryland State public school students taking a mathematics assessment test…

A: We have given that,  Let X be the random variable from normal distribution with mean (μ) = 230 and…

Q: The annual per capita consumption of ice cream (in pounds) in the United States can be approximated…

A: It is given that the mean is 20.7 and the standard deviation is 4.2.

Q: The final exam scores in a Mathematics class were normally distributed with a mean of 75 and a…

A: As per our guidelines we are suppose to answer only one question. Given,mean(μ)=75standard…

Q: A study of the amount of time it takes to rebuild the transmission for a 2005 Chevy Cavalier shows…

A: Given information- Population mean, µ = 8.4 hours Population standard deviation, σ = 1.8 hours We…

Q: The diameter of a brand of tennis balls is approximately normally distributed with a mean of 2.5…

A: Given that, Mean = 2.5 Standard deviation = 0.5 Sample size = 50

Q: A book publisher claims that its mean book length is 250 pages with a standard deviation of 70…

A:

Q: On the distant planet Cowabunga, the weights of cows have a normal distribution with a mean of 538…

A:

Q: Suppose the area that can be painted using a single can of spray paint is slightly variable and…

A: It is given that the area that can be painted using a single can of spray paint has a normal…

Q: Find the indicated probability. An insurance company has determined that the cost of a certain…

A: Given information Mean µ = $800 Standard deviation σ = $40

Q: The time it takes to fly from Paris to London is normally distributed. If the mean flight time is 80…

A: We are given with Normal Distribution.

Q: On the distant planet Cowabunga, the weights of cows have a normal distribution with a mean of 605…

A: The provided information are:

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.