5. The U.S. average for state and local taxes for a family of four is $4172. A random sample of 20 families in a northeastern state indicates that they paid an annual amount of $4560 with a standard deviation of $1590. At a = 05, is there sufficient evidence to conclude that they pay more than the national average of $4172?

Q: 4. Consider that in a population of Filipino adults ages 18 to 65, Body Mass Index (BMI) is normally…

A: Given: X~N(μ,σ)μ=28σ=6

Q: Suppose I surveyed a random sample of commuters who had jobs in Manhattan, 51 whose primary mode of…

A: Given information: n1=51M1=40,000s1=5100n2=80M2=60,000s2=8000 a) the difference of the sample means:…

Q: Consider a sample with a mean of 500 and a standard deviation of 100. What are the z-scores for the…

A: The mean is 500 and the standard deviation is 100.

Q: 4. Suppose that in the past years the average price per square foot for warehouses in Subic has been…

A: One sample t-test: The one -sample t -test is used to determine whether the mean of sample differs…

Q: 3. Suppose the mean blood glucose of a population of adults is 162 with a standard deviation σ=58.…

A: Given that, n=36,μ=162σ=58 The mean and standard deviation of sample mean is,

Q: An entrance examination is to be conducted to 1600 ncoming freshmen students at Gordon college which…

A: Let X be the variable denoting score of the exmination. X ~ N (μ, σ) Given mean, μ = 85 standard…

Q: 2. The mean afternoon temperature in Quezon City for the month of April is 37°C and the standard…

A: The normal distribution related problems can be solved by using the standard normal z score method…

Q: A manager is interested in finding the average number of sales per day at a sporting goods store. If…

A: Obtain the sample size. The sample size is obtained below as follows: Use EXCEL Procedure for…

Q: According to one pollster, 56% of children are afraid of the dark. Suppose that a sample of size 28…

A: The standard deviation id the sampling distribution of the sample proportion is represented as and…

Q: For a population with a mean of 75 and a standard deviation of 12, what proportion of sample means…

A: Given, Mean μ = 75 Standard deviation σ = 12 sample size n = 16

Q: 3. A line up for tickets to a local concert had an average (mean) waiting time of 20 minutes with a…

A: Formula : Z =(X - μ)/σ

Q: Suppose that the scores on a statewide standardized test are normally distributed with a mean of 71…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: Suppose, according to a 1990 demographic report, the average U. S. household spends $90 per day.…

A:

Q: Suppose that 100,000 recent grads have starting salaries which are normally distributed with a mean…

A: Given that  μ=120,000σ=20,000 b) Consider the probability that the salary above $131,200 is,…

Q: A large retailer wants to determine whether the mean income of families living within two miles of a…

A: Denote μ as the population mean income of families living within two miles of proposed building…

Q: According to the Air Transport Association of America, the average operating cost of an MD-80 jet…

A:

Q: Suppose I surveyed a random sample of commuters who had jobs in Manhattan, 51 whose primary mode of…

A: Given that                  We have to find  (a) The question of interest is whether the mean…

Q: 24. Suppose annual salaries for sales associates at Target have a mean of $32,500 and a standard…

A: According to the provided information, Mean (μ) =$32500 Standard Deviation (σ) = $2500

Q: a) Between what two values would you expect to find about 95% of the lead actresses ages, based on…

A: Given, Meanμ= 29.6 Standard deviationσ = 6.4 Let popular actress Reese Witherspoon's age be x x = 36…

Q: Consider a sample with a mean of 500 and a standard deviation of 100. What are thez-scores for the…

A: Introduction: Consider X as a normally distributed random variable, with mean μ and standard…

Q: For a recent "Smartest State in America" article, a journalist wants to know how many people with a…

A: The mean is 5,000,000 and the standard deviation is 450,000.

Q: A company pays their employees an average of $52,500 per year. If the standard deviation for the…

A: Given : A company pays their employees an average of $52,500 per year. If the standard deviation for…

Q: Soum that the red blood cell counts of women are normally distributed with a mean of 4.577 million…

A: Solution: Let X be the red blood cell counts of women. From the given information, X follows normal…

Q: A teacher claimed that the average score of students in Math class was 77 with a sample standard…

A:

Q: If the average salary of a computer programmer is $71, 800 with a standard deviation of 13, 000,…

A: I am attaching image so that you understand each and every step.

Q: director

A:

Q: If the average American sleeps 8 hours a night, with a standard deviation of 1 hour, and I plan on…

A:

Q: Assume that the test scores from a college admissions test are normally distributed, with amean of…

A:

Q: The US department of Agriculture claims that the mean annual consumption of tea by a person in the…

A:

Q: The 2019 General Social Survey asked a number of teenagers from different countries how much time…

A: To check if there is a larger variety of TV watching times for teenagers in the United States is…

Q: 2. A scrap metal dealer claims that the mean of his cash sales is "no more than $80," but an…

A: Given that: Population mean(u) = $ 80 Sample mean = $ 91 SAMPLE standard deviation = $21 Sample size…

Q: VII. The NYC MTA claims the average wait time for an F train after midnight is less than 21 minutes.…

A: Given, μ = 21n = 15X¯ = 24S = 9     Test the claim that the average wait time for an F train after…

Q: 2. If the heights of a male youngsters are normally distributed with a mean of 60 inches and a…

A:

Q: ÁČTÍVITY 2: Cris Elevators Inc. claims that the average cost of elevator installation and repair is…

A: Given : n(sample size)=60 Alpha(level of sig.)=0.05 s(sample stand. dev.)=3000

Q: 2. A manufacturer of mugs packages them in boxes of 100.lt is shown that, on the average, mugs weigh…

A: Solution

Q: The average wage for bank managers in a certain city is $91,900 per hour with a standard deviation…

A: Given that  X~N( μ = 91900 , ? = 24300) μ = 91900 , ? = 24300 Z-score =( x - μ )/?

Q: Suppose that the scores on a statewide standardized test are normally distributed with a mean of 65…

A: Given information- Mean, μ = 65 Standard deviation, σ = 4 a) The percentage of scores that were…

Q: 2) A job placement director claims that the average starting salary for nurse is $26000. A sample of…

A:

Q: Suppose that the scores on a statewide standardized test are normally distributed with a mean of 70…

A: Let , X denotes  scores on a statewide standardized test .  Therefore , X - > N (mean = 70 , sd =…

Q: For a population with a mean of μ = 55 and a standard deviation of σ = 23, what is the standard…

A: Given : a population with a mean of μ = 55 and a standard deviation of σ = 23   We need to calculate…

Q: The average undergraduate cost for tuition, fees, and room and board for two-year institutions last…

A: Given, n =  μ = 13252x¯ = 15560s = 3500α = 0.01

Q: 3- At a computer manufacturing company, the actual size of a particular type of computer chips is…

A: We have to find required sample mean.

Q: Jessica, the owner of a medium-scale native handicrafts shop, knows from experience that the time…

A:

Q: Suppose that the average height of men in the United States is approximately normally distributed…

A: From the provided information, Mean (µ) = 70 Standard deviation (σ) = 4 X~N (70, 4) Here X be a…

Q: Suppose that the scores on a statewide standardized test are normally distributed with a mean of 69…

A: Let X denote the scores on a statewide standardized test and it follows normal distribution with…

Q: A statistics professor announces that 15% of the grades he gives are As.  The results of the final…

A: Solution:From the given information, mean score is 83, standard deviation is 6. The fifteen…

Q: Suppose a class average on a test is 75 and the standard deviation is 10. if joe scores 80 on the…

A:

Q: 1.) It is claimed that the average performance of newly graduated nurses from the recent board exam…

A: Since you have asked multiple question, we will solve the first question for you. If youwant any…

Q: Suppose that the amount of time that takes place for the Bureau of Internal Revenue to send refunds…

A: Solution: 4. Let X be the amount of time. From the given information, X follows normal distribution…