The U.S. average for state andlocal taxes for a family of four is $4251. A randomsample of 20 families in a northeastern state indicatesthat they paid an annual amount of $4654 with astandard deviation of $950. At a=0.1, is theresufficient evidence to conclude that they pay more thanthe national average of $4251?

Q: The average American family of four spends $5,000 per year on food prepared at home. Assuming a…

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Q: A college professor noted that the grades of his students in an introductory statistics class were…

A:

Q: What proportion of trucks can be expected to travel between 38,000 and 62,000 miles in the year?

A: Normal distribution is also known as the Gaussian distribution . It is widely used to make complex…

Q: Two out of 8 students at a local college say that they skip dinner in the evening. Find the mean,…

A: Given that  Success of probability p =2/8=0.25 Number of trials n=20 X~binomial (n,p)

Q: The mean weight of newborn infants at a community hospital is 6.6 pounds. A sample of seven infants…

A: Sample points are 9.0,7.3,6.0,8.8,6.8,8.4,6.6. Sample size = n = 7.

Q: A hotel near the university always fills up on the evening before football games. History has shown…

A: Given, Mean =μ=5 Standard deviation =σ=3.3 Average room rate is=$80

Q: An article in the Register stated that students in the state university system take 4.5 years, on…

A: Givensample size(n)=49Mean(x)=5.1standard deviation(s)=1.2significance level(α)=0.01

Q: Investigate the stability of the following system using "Jury' method. C(2) R(z) 2*-1.2z'+0.07z…

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Q: oby's Trucking Company determined that on an annual basis, the distance traveled per truck is…

A:

Q: The mean rate for cable t.v.from a sample of 80 households was $29 per month with a standard…

A:

Q: A sample of assistant professors on the business faculty at state-supported institutions in Ohio…

A: It is given that the mean is 72000 and the standard deviation is 3000.

Q: sample of assistant professors on the business faculty at state supported institutions in Ohio…

A: # Given : mean salary of assistance professor =$32000 and standard deviations=$3000  to find…

Q: 1,500 women followed the Atkin’s diet for a month. A random sample of 30 women gained an average of…

A:

Q: The amount of money that a person from the United States spends at a fast-food restaurant is…

A: Given data, μ=8σ=1.25n=81

Q: e heights of adult men in the United States are normally distributed with a mean of 70 inches and a…

A: Given: μ=70, σ=2.5 The corresponding z-value needed to be computed: The probability that men in US…

Q: In a sample of 240 workers, in a factory the mean and standard deviation of wages were $ 113.50 and…

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Q: The average weekly earnings of bus drivers in a city are $950 with a standard deviation of $45.…

A: The formula for calculating the standard error of the sample is,

Q: Suppose that another sample of resting heart rates for five Math students was obtained: 72, 68, 66,…

A: From the given data we want to know the data value .

Q: Assume the annual day care cost per child is normally distributed with a mean of ​$9000 and a…

A:

Q: what is the value of the standard deviation of the weekly earnings of the bus drivers?

A: Let X be the random variable for the weekly earnings of bus drivers.Given that,Population mean

Q: The U.S. Department of Transportation provides the number of miles that residents of the 75 largest…

A: There are two independent populations. Those which are named as Buffalo residents and Boston…

Q: . Average annual expense of a middle-income household living in Afghanistan is 360,000 Afghani with…

A: Given, Mean μ = 360000Standard deviation σ = 4000sample size n = 1500

Q: In an all boys school, the heights of the student body are normally distributed with a mean of 71…

A: Solution: Let X be the height of the student boy. From the given information, X follows normal…

Q: Professor Ivy’s students have a Mean grade of 69.5 and a Standard Deviation of 6.5.  If Johnny has…

A: From the provided information, Mean (µ) = 69.5 Standard deviation (σ) = 6.5 Let X be a random…

Q: A researcher wish to test the claim that the average cost of tuition and fees at a four year public…

A: Null hypothesis: H0 : μ = 5700 Alternative hypothesis: H1 : μ >5700 Obtain the test statistic…

Q: Suppose the average credit card debt for Americans is $7000 and is not normally distributed with a…

A: Given information:  Population mean (u) = $ 7000  Sample size (n) = 40 Sample mean (x) = $ 6500…

Q: The hotel room rate in Miami, Florida is normally distributed with a mean of $286 per night. Assume…

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Q: The mean airfare for flights departing from Buffalo Niagara International Airport during the first…

A: Obtain the probability the sample mean will be within $20 of the population mean cost per flight.…

Q: An instructor claims that the average number of hours needed to study for a final exam in order to…

A: The significance test for single mean is tested using the z test, if the population standard…

Q: A random sample of 120 cars in the drive-thru of a popular fast food restaurant revealed that the…

A: Given: n=120,x=29.27,σ=6.17,α=1-0.82=0.18

Q: According to Kaiser Family Foundation survey in 2011 and 2010, the average premium for…

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Q: A survey found that the average hotel room in New Orleans is $88.42 and the average room rate in…

A:

Q: The daily income of bank auditors in SSS Commercial Bank is normally distributed with a mean of ₱675…

A: Given data,μ=675σ=50

Q: Toby's Trucking Company determined that on an annual basis, the distance traveled per truck is…

A: It is given that the mean and standard deviation are 50,000 and 12,000.

Q: According to the Annual survey of drugs expenditure in country X, the annual expenditure…

A: Let X be the random variable such that drugs expenditure in-country  x̅: Sample mean of drugs…

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.