The Cairo Center for Rural Studies estimates that about 6% of Egypt’s citizens do not have adequate access to drinking water.  Suppose, as part your research there, you determine that the amount of rainfall annually in Egypt is a continuous random variable distributed normally with an average amount of rainfall of 6 inches with a standard deviation of 1.10 inches.  Can you help government officials there determine what level of annual rainfall has 2.3% below it?

Q: Recent Environmental Protection Agency (EPA) fuel economy estimates for automobile models tested…

A: Given that Mean(µ) = 24.8 Standard deviations (σ) = 6.2

Q: A Texas Instrument calculator operating life is normally distributed with a mean of 3,850 hours, and…

A: Given information- Population mean, μ = 3850 hours Population standard deviation, σ = 350 hours…

Q: according to chebyshev's theorem, at least 88.9% of data will be between   Mean=15.4  Standard…

A: Chebyshev's theorem gives the minimum proportion of the data which must lie within a given number of…

Q: A report about how American college students manage their finances includes data from a survey of…

A: Population mean = ? = 907 Sample S.D = s =205 Sample size = n =500 Sample mean = x̅ = 825

Q: Deforestation along the Sierra Madre mountains have been especially notorious. The average number of…

A: It is given that  Mean, μ = 4115 Standard deviation, σ = 610 Z-Score, Z = ( X - μ )/σ

Q: The monthly household income of a certain district in Manila is a normally distributed random…

A:

Q: The weekly salaries of teachers in one state are normally distributed with a mean of $980 and a…

A: Let, X=The weekly salaries of teachers in one state  Given that X is normally distributed with a…

Q: by pany robability that the proportion of defective television

A: Given: EX=0.25VX=0.0375 P(0.2 < X < 0.5)

Q: Your company has a contract to perform preventive maintenance on thousands of air- conditioners in a…

A: Given that μ=1 hour and σ=1 hour Let X denote the time spent in servicing a unit.

Q: The WNBA was founded in 1996 as the women's counterpart to the NBA. The heights of the women playing…

A: Given data: The heights of the women have a symmetrical distribution with mean and standard…

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

A:

Q: top 19 percent are

A: Given that  High school students across the nation complete in a financial capability challenge each…

Q: H & G is a steel bolts manufacturing company. Their current steel bolts have a mean diameter of 135…

A: Given that: X is normally Distributed with mean µ = 135.0 and standard deviation σ = 5.0 By using…

Q: A researcher wishes to estimate the average height of men for a certain region of the country. If…

A: Probability is the measure determine the likelihood of an event. Event is the outcome of an…

Q: A courier company that operates in the Tijuana metropolitan area takes an average of 36 minutes to…

A: Answer: From the given data, Let X denotes delivery time of a courier company that operates in the…

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: The speed limit on Interstate 81 in Susquehanna County is 70 miles per hour (mph).  On a clear day…

A: The speed limit on Interstate 81 in Susquehanna County is 70 miles per hour (mph) The mean speed of…

Q: The speed limit on Interstate 81 in Susquehanna County is 70 miles per hour (mph). On a clear day…

A: Solution-: Given: μ=77.9mph,σ=8.2mph We find, P(a randomly selected car is going over 85 mph)=?

Q: The weights of cans of Ocean brand tuna are supposed to have a net weight of 6 ounces. The…

A: Provided information is ; Let , X be the net weight Population mean(μ)  = 5.95 Population standard…

Q: Problem 6. On a particular production line, the likelihood that a light bulb is defective is 7%.…

A: It is given that the number of observations are independent with the probability of success p = 7% =…

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: The weekly salaries of teachers in one state are normally distributed with a mean of $490 and a…

A: Given,Mean, μ = 490Standard deviation, σ = 45Let X be a random variable represents the weekly…

Q: The mean cost of a new Sport Utility Vehicle (SUV) has been found to be $42,500 with a standard…

A:

Q: Suppose that, in 1995, the weight of 16-year old males in the United States was normally distributed…

A: Thank you for posting this question ! You have correctly chosen that a z test needs to be performed…

Q: A relatively new breed of cat that first appeared in China frequently suffers from joint problems.…

A: Given Information: A new breed of cat that first appeared frequently in China suffers from joint…

Q: Given a normal population with mean = 39 and variance = 16, what is the probability of obtaining an…

A:

Q: A random sample of 25 observations yield a mean of 106 and a standard deviation of 12. What is the…

A: It is given that mean and standard deviation are106 and 12, respectively.By using central limit…

Q: Suppose that an accounting firm does a study to determine the time needed to complete one person's…

A: Given that  An accounting firm does a study to determine the time needed to complete one person's…

Q: A chemical engineer processes 20 pilot batches and has the following active ingredient yield…

A: The probability of getting at least 50.5 grams per litre if the true mean yield is 52 grams per…

Q: It is known that the population variance equals 522. What is the sample size that needs to be taken…

A: It is given that:

Q: the standard Z value of a 16-unit sample taken randomly from a normal distribution populason with an…

A:

Q: Suppose that, in 1995, the weight of 16-year old males in the United States was normally distributed…

A: Null and the alternative hypothesis: The type of test is right tailed test The value of z-test…

Q: In a recently conducted study, families reported using an average of 70 gallons of gasoline per…

A:

Q: The starting salaries of individuals with an MBA degree are normally distributed with a mean of…

A: From the provided information, Mean (µ) = $40,000 Standard deviation (σ) = $5,000

Q: A certain prescription medicine is supposed to contain an average of 250 parts per million (ppm) of…

A:

Q: In its fuel economy economy guide, the EPA gives a variety of data on 2016 model year vehicles.  If…

A: Let X denote the highway gas mileage is approximately normally distributed with mean 23.0 mpg and…

Q: In a research study, conducted by the National Institute of Health, 25 individuals were sampled…

A: From the given information, In a research study, conducted by the National Institute of Health, 25…

Q: In the United States, egg sizes are set by the Department of Agriculture. A "large" egg, for…

A:

Q: A report claimed that children between the ages of 2 and 5 watch an average of 25 hours of…

A: Given, Mean = 25 Standard deviation = 3 Sample size = 40   The objective is to find the probability…

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.