In determining automatic mileage ratings, it was found that the mog in the city for a certain model is normally distributed, with a mean of 39 mpg and a standard deviation of 1.6 mpg. Suppose that the car manufacturer samples four cars from its assembly line and test them for mileage ratings.   A. What is the distribution of the mean for the sample? B. What is the probability that the mean mpg of the smaple will be greater than 40 mpg? C. What is the probability that the mean mpg of the sample will be less than 37.5 mpg?

Q: 1) Which sample will have the larger mean number of books read? 2) Which sample will have the larger…

A: The given histogram is:

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

A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will…

Q: A one-sample z-test was conducted in which the sample mean was 76, the population mean was 82, the…

A:

Q: An insurance company is reviewing its current policy rates. When originally setting the rates they…

A: we have given that n=40 ,mu=1800 , xbar=1950 and sigma=500 , alpha =0.05

Q: In determining automobile mileage ratings, it was found that the mpg (x) for a certain model is…

A: Given that, Mean = 32 Standard deviation = 1.3

Q: If specifications for a research project require the standard error of the corresponding…

A: From the provided information, Standard error (SE) = 5 Population standard deviation (σ) = 45

Q: a) What is the mean of the sampling distribution? b) What is the standard deviation of the sampling…

A: Let p be the population proportion. Then p = 0.72 Let X denote the number of Americans in sample of…

Q: The College Board reported the following mean scores for the three parts of the Scholastic Aptitude…

A:

Q: Calculate SS, variance, and standard deviation for the following sample of scores: 15, 16, 9, 1, 9

A: let us consider x = scores   scores ( x- x¯ ) ( x-x¯ )2 15 5 25 16 6 36 9 -1 1 1 -9 81…

Q: The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally…

A: GivenMean(μ)=1252standard deviation(σ)=129

Q: A sports shop selects a random sample and records the sales of items made in China and those made in…

A: Standard Error is given by, s.e.(xchina) = σchinan So, here σchina =std. deviation for china = 9.75n…

Q: Given a distribution with a mean of 90 and a standard deviation of 10, what is the probability of…

A: Given Information: μ=90 σ=10 x1=85 x2=110

Q: The Good-Guys Car Dealership has tracked the number of used cars sold at its downtown dealership.…

A:

Q: The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: The Cpa practice advisor reports that the mean preparation fee for 2017 federal income tax returns…

A: From the provided information, Mean (µ) = $273 Standard deviation (σ) = $100 X~N (273, 100) Here X…

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

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: Given a mean price of a residential real estate sales of KD 527,000 and a standard deviation of KD…

A: To find the probability of: a) having a sale above KD 550,000 b) having a sale below KD 527,500

Q: 3. The number of cars that passes through Sta. Mesa Highway every weekday resembles a normal…

A: Given that mean =8702 ,s.d =678 p( 7000 < x < 8000) =?

Q: Given a standardized normal distrubtion (with a mean of 0 and a standard deviation of 1, as in Table…

A: Standard normal distribution:The standard normal distribution is a special case of normal…

Q: According to the IRS, the average refund in the 2011 tax year was $3,109. Assuming that the standard…

A: Given information- Sample size (n) = 50 Population Mean µ = $3,109 Standard deviation (σ) = $874

Q: f the mean age of the managers in company is 52 years with a standard deviation of 2.5 years, what…

A:

Q: (a) Compute the sample standard deviation for the number of breweries east of the Mississippi River.…

A: Given: State No. of breweries Georgia 22 Illinois 52 Kentucky 13 Maine 38 Maryland 23…

Q: In determining automobile mileage ratings, it was found that the mpg in the city for a certain model…

A: a. Let x¯ be the mean mpg in the city which follows normal distribution. The mean of the sample mean…

Q: The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally…

A: GivenMean(μ)=1252standard deviation(σ)=129

Q: Bank of America's Consumer Spending Survey collected data on annual credit card charges in seven…

A:

Q: Bank of America’s Consumer Spending Survey collected data on annual credit card charges in seven…

A: Given d=850 and sd=1123 a) To test: H0:μd=0H1:μd≠0

Q: The number of chocolate chips in an​ 18-ounce bag of chocolate chip cookies is approximately…

A: Answer: Given that   ‘x’ is Normally distributed with                 Mean  µ =1252       standard…

Q: Suppose a Realtor is interested in comparing the asking prices of midrange homes in Peoria,…

A: Given n1=21x¯1=116900s1=2300n2=26x¯2=114000s2=1750α=0.01

Q: Many families in California are using backyard structures for home offices, art studios, andhobby…

A: The known values are,  a) The z-score for a backyard structure costing $2300 is,

Q: Suppose a Realtor is interested in comparing the asking prices of midrange homes in Peoria,…

A: Here we are trying to test whether the mean of two population differs significantly or not. It is…

Q: A study is run to investigate body mass index (BMI) in children living in urban neighborhoods. Based…

A: The provided data for the body mass index is, 29, 26, 24, 32, 30, 22, 27, 28, 31 The sample mean is,

Q: Cans of a popular soft drink are filled so that the actual amounts have a mean of 15.00 oz and a…

A:

Q: claims that Chip Ahoy Cookies have an x ̅=28.67 per cookie with a SD=2.67. Assuming this information…

A: Given data,Mean x=28.67sd    =2.67  what is the population parameter for the standard deviation?

Q: Please answer the last part of C:

A: The mean difference is $850 and the sample deviation is sd is $1,123.

Q: Salvatore, as the director of a regional bank, is concerned about the wait times of customers at the…

A: 48 patrons at each branch selected, For each branch means and standard deviation mentioned. We have…

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A:

Q: Test the claim that for the adult population of one town, the mean salary is $28,000. If a sample of…

A: Given information- Sample size, n = 25 Sample mean, x-bar = $23,500 Sample standard deviation (s) =…

Q: Bank of America’s Consumer Spending Survey collected data on annual credit card charges in seven…

A: (1) State the hypotheses. That is, there is no evidence that the difference between the population…

Q: Many families in California are using backyard structures for home offices, art studios, andhobby…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: Bank of America's Consumer Spending Survey collected data on annual credit card charges in seven…

A: From the provided information, Sample size (n) = 42 Mean difference = $850 Sample standard deviation…

Q: Consider the following service system. The average inter-arrival time is 10 minutes, and the…

A: Data Given: The arrival Rate is 10 minutes. Service Time is 5 minutes.

Q: A researcher was interested in comparing the amount of time spent watching television by women and…

A: A researcher was interested in comparing the amount of time spent watching television by women and…

Q: . The on-campus housing costs for a semester at a state university are Normally distributed with a…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: Bank of America’s Consumer Spending Survey collected data on annual credit card charges in seven…

A: Given values are, Sample mean difference d= 850 sample standard deviation Sd= 1123 number of sample…

Q: The Downtown Parking Authority of Tampa, Florida, reported the following information for a sample of…

A: We are given a table.

Q: In the p-chart of Audit Data shown below, if the estimate of the standard deviation was 0.0724, what…

A: Solution: Given information: The control limits of  p chart are  UCL = 0.4203 Central Line = P =…

Q: The instruction manual for an IKEA bookshelf claims that it will take 2 people 41 minutes to…

A: The Null hypothesis H0: μ = 41. Alternative hypothesis Ha: μ <41 Here, α =0.10 Since population…

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

A: Note: Hi! Thanks for posting the question. Since there are more than three sub-part questions, we…

Q: sample of 25 cappuccinos shows a mean of 42.1 oz of espresso and a standard deviation of 0.38 oz. A…

A: Given: Sample size, n = 25 Sample mean,  = 42.1 Standard deviation, s = 0.38

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.