Length of Time to Sell a Home. According to the the National Association of Realtors, it took an average of three weeks to sell a home in 2017. Data for the sale of 40 randomly selected homes sold in Greene County, Ohio, in 2017 showed a sample mean of 3.6 weeks with a sample standard deviation of 2 weeks. Conduct a hypothesis test to determine whether the number of weeks until a house sold in Greene County differed from the national average in 2017. Use a = .05 for the level of significance, and state your conclusion.

Q: One prominent physician claims that 80% of those with lung cancer are chain smokers. Compute the…

A: Here, we can consider that it is Binomial distribution because  80% of people has lung cancer and…

Q: The mean value of land and buildings per acre from a sample of farms is $1500, with a standard…

A: The mean is 1500 and the standard deviation is 300.

Q: Would a person spending $476 on their car be considered usual or unusual if the amount spent by the…

A: Given information- Population mean µ = $347 Population standard deviation, σ = $39.58 Let, X be the…

Q: Refer to the accompanying table, which describes the number of adults in groups of five who reported…

A: The data on the number of adults in a group of five are given as…

Q: the following data set represents the number of new computer accounts registered during 5…

A:

Q: Seventy-six percent of Americans favor spending government money to develop alternative sources of…

A: Given that  p = 75%    and.   n = 140 By using the Binomial distribution

Q: A Student Gender Hours online/week Friends 1 male 2 female 50 L30 3 female 4 female 70 2.

A: Given: The data given is as below Hours online/week Friends 4 90 2 50 2 30 5 70 5 70…

Q: Refer to the accompanying table, which describes the number of adults in groups of five who reported…

A:

Q: If you have 100 people in your sample, what would be the degrees of freedom you use to calculate the…

A: Given, n=100 Degree of freedom(df)=?

Q: a. The mean, median and mode b. The standard deviation and variance.

A: Given: number of observation, n=10 values for fuel economy  40 33 32 30 27 29 27 23 21 10

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A:

Q: The average daily points for my fantasy baseball team are {4.1, 5.7, 3.8, 4.7, 4.7, 5.5, 4.1, 2.7,…

A: Solution: Note: Hello! As you have posted more than 3 sub parts, we are answering the first 3…

Q: Given a mean of 24.5 and a standard deviation of 1.7, within how many standard deviations of the…

A: A mean of 24.5 and a standard deviation of 1.7

Q: Find the sample standard deviation. The top five scores on last semesters midterms were 90 97 100 90…

A: The question is about measures Given : Data - 90, 97, 100, 90, 93   To find : Sample std. deviation

Q: Food fryers manufactured by a company that supplies food trucks can fry a mean of 132.4 pounds of…

A: Let X be the random variable from Normal distribution with mean (μ) = 132.4 and standard deviation…

Q: video game c

A: given, sample size(n) = 1500 sample mean (x̄) = 115 sample stadard deviation (s) = 11

Q: Identify the population(s). Average number of Americans who consume alcohol. All individuals who…

A: Parameter: Parameter may be defined as which one is based on population

Q: Given the following data sets, solve the range, variance, and standard deviation. a. 30, 24, 40, 50,…

A: Hint: Range, variance and standard deviation are the measures of dispersion.  Range, variance and…

Q: A company wanted to determine the child care costs of its employees. A sample of 25 employees were…

A: Solution :  In above example a value of one of the sample change so we know that standard deviation,…

Q: Calculate Median, Q1, Q3 and IQR, sample mean, sample variance, and sample standard deviation for…

A: Given: data 48, 92, 47, 44, 94, 18, 95, 67, 74, 64

Q: The highway mileage (mpg) for a sample of 8 different models of a car company can be found below.…

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Q: The annual commissilons per salesperson employed by a retailer of mobile communication devices…

A: Let X be the random variable from normal distribution with mean (μ) = $ 41200 ans standard deviation…

Q: The daily rates of a sample of eight employee at POL Corp. are $550, $420, $560, $500, $700, $670,…

A:

Q: he highway mileage (mpg) for a sample of 8 different models of a car company can be found below.…

A: The given sample is 30, 35, 22, 19, 29, 35, 27, 26.

Q: A population of scores has a mean of ? = 35 and ? = 3.5. Find the z-scores that correspond to the…

A: Solution- Given that mean mu=35 and standard deviation s=3.5 Find Z score for corresponding X values…

Q: marketing analyst’s sample of six companies’ social media apps value were$25, $7, $22, $33, $18,…

A:

Q: 3. Compute for the following, given these data: 132, 144, 127, 152, 101, and 165. a. Coefficient of…

A: Provided data is:132, 144, 127, 152, 101 and 165.Arranging data in ascending order; 101, 127, 132,…

Q: In a 2015 study entitled How Undergraduate Students Use Credit Cards, it was reported that…

A: Here we have to identify What type of t-test should be used here

Q: The manager of a fast-food restaurant records each day for a year the amount of money received from…

A: From the provided information, Mean (µ) = 1337 Standard deviation (σ) = 204 X~N (1337, 204) Here X…

Q: Given the set of data: (77, X. 75, 79, 79, X, 76, 75, X, 76}. If the unknown data X is the mode and…

A:

Q: On average 16 customers are served per hour in a bank serving point. What is the mean and standard…

A:

Q: Twenty-six car salespeople were sampled to see how many cars they sold in a month; the following…

A: 19, 27, 27, 14, 23, 17, 32, 11, 27, 31, 22, 33, 28, 26, 31, 25, 23, 31, 26, 36, 24, 28, 12, 28, 25,…

Q: Seven students on an intramural team weigh 179 ​lb, 177 ​lb, 174 ​lb, 185 ​lb, 167 ​lb, 186 lb and…

A: Given179,177,174,185,167,186,220sample size(n)=7

Q: rchers published a study that investigated the degree to which a country's households waste food.…

A:

Q: Disability causes 48% of all mortgage foreclosures. Given that 20 mortgage foreclosures are audited…

A: Here's if we consider Binomial distribution then probability of success is 0.48 and number of trial…

Q: Suppose a government department would like to investigate the relationship between the cost of…

A: The data shows the a random sample of 10 homes heating cost and square footage.

Q: The mathematics achievemnet test cscore of 750 students were found to have a mean and variance of…

A: It is given that  Mean, μ = 600 Variance, σ2 = 4900 Standard deviation, σ = 70 Sample size, n = 750…

Q: The standard deviation of a data set is zero. This means that a. All the values are equal to zero b.…

A:

Q: Six different​ second-year medical students at Bellevue Hospital measured the blood pressure of the…

A: Given 126,138,132,138,124,122

Q: Give the TI commands to find the mean, median, and standard deviation and compare to the original…

A: TI Calculator

Q: In a certain suburb, the mean house price in 2009 was $ 225,000. A real estate agent believes that…

A: Given that The mean house price  $ 225,00 i.e. µ = 225,00