HCC builds 3 and 4-unit apartment buildings for investors and it is believed that the total construction time in days follow a normal distribution. With improvements in construction technology, the mean time to construct a triplex was reduced from 100 days to 80 days, however the standard deviation increased from 20 to 25 days. Failure to complete the triplex in 125 days still results in severe penalty fees. After these technological improvements have been implemented by HCC, answer the following questions: a. What is the probability of HCC not violating the contract and what is the probability of HCC violating the contract?

Q: Suppose a normally distributed set of stock prices with 9000 observations has a mean of 187 and a…

A: Normal distribution μ = 187σ = 14 N = 9000 E(173<x<229) = ? empirical rule : approximately…

Q: Standard Normal Curve Areas (page 1) The column under A gives the proportion of the area under the…

A:

Q: A social service agency plans to conduct a survey to determine the mean income of its clients. The…

A: Population standard deviation, Margin of error, No, we do not need an estimate of the current mean…

Q: Six months before its annual convention, the American Medical Association must determine how many…

A: To solve this problem in Excel, we will use the Monte Carlo simulation add-in @RISK. a. Normal…

Q: You may need to use the appropriate appendix table or technology to answer this question. A sample…

A: population mean, μ = 1110 standard deviation , σ = 160   sample size, n = 64 sample mean, x = 1135

Q: Dr. Samwell Tarly wants to estimate the number of books checked out of the library in the past year.…

A: It is given that the mean is 10,000 and the standard deviation is 10.

Q: knowing the mean will be within ±0.5 mm?

A:

Q: According to a theory in psychology, young female adults show more emotional empathy toward others…

A: Note : As per the Bartleby guildlines we have to solve first three subparts and rest can be…

Q: The internal revenue service reports that the mean federal income tax paid in the year 2010 was…

A: From the provided information, Mean (µ) = 8040 Standard deviation (σ) = 4600 X~N (8040, 4600) Sample…

Q: The Wall Street Journal reported that automobile crashes cost the United States $162 billion…

A: formula for the sample size

Q: The fraction of the population that will receive adequate amounts of vitamins under the given plan…

A: In nutrition, the recommended daily allowance of vitamins is a number set by the government to guide…

Q: Please review Section 9.3. A survey of nonprofit organizations showed that online fundraising…

A: The random variable one-time gift donation follows normal distribution. The sample size is 59. The…

Q: he American Community Survey (ACS), part of the United States Census Bureau, conducts a yearly…

A: Given, 90% confidence interval: ($69,720, $69,922) Lower confidence interval = $69720 Upper…

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: According to a theory in psychology, young female adults show more emotional empathy toward others…

A:

Q: A diet clinic states that there is an average loss of 24 pounds for those wh weeks. The standard…

A: A diet clinic states that there is an average loss of 24 pounds and standard deviation is 5 pounds.…

Q: The Bureau of the Census provides figure on the average annual income of all Pakistan households in…

A: Given that The mean household income in 2015 = $32,144. The median household income in 2015 =…

Q: A group of university students is exploring the connection between study hours and academic…

A: Let x be the independent variable and represent the study hours of a group of university…

Q: a. Plot the frequency chart of monthly excess stock returns, and compute mean, volatility (i.e.,…

A: We have, Mean=0.0013146sd=0.0862379skewness=0.2246Kurtosis=5.49999 Skewness measures the lack of…

Q: A professor using an open-source introductory statistics book predicts that 60% of the students will…

A: given data, 60% - student will purchase a hard copy of the book,25%- will print it out from the…

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: According to the US Bureau of Labor Statistics, the average American consumer in 2018 spent $7,923…

A: mean = 7923 s = 1592 z-value = 1.282

Q: Please review Section 9.3. A survey of nonprofit organizations showed that online fundraising…

A: Given X-bar=75 Standard deviation=20 n=54 N=70

Q: a.   The average age of 12 jurors on a jury is 50 years.     b.   The standard deviation of…

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

Q: A local firm reported that an American family of four washes an average of 2000 pounds of clothes…

A:

Q: Suppose that we know that 33.8% of the people born in the United States between 1936 and 1951 have…

A:

Q: Condé Nast Traveler conducts an annual survey in which readers rate their favorite cruise ship. All…

A: Sample Size Sample mean Population S.D Sample 1 n₁ = 37 x̅₁ = 85.36 σ₁ = 4.55 Sample 2 n₂ = 44…

Q: A product code consists of a string of 4 different letters selected from the set {S,T,U,V,W,X}. How…

A: The number of ways to arrange r objects selected from n distinct objects is given by the permutation…

Q: hospital in New York commonly conducts stress tests to study the heart muscle after a person has a…

A: Given that Sample size =50  Sample mean =32 Sample standard deviation =9 Population mean =68 Level…

Q: UG is curious how likely they are to reach their annual profit target. Past experience suggests that…

A: Given Mean =12 Standard deviation=2

Q: A grocer finds that the cantaloupes in his store have weights with mean 0.7 kg and standard…

A: Given, Mean weight of cantaloupes is 700 gm. Standard deviation is 53 gm

Q: e patient recovery time from a particular surgical procedure is normally distributed with a mean of…

A: GIVEN DATA, normal distribution μ=5.3σ=1.1we have to find out the given probabilties

Q: Part 3 a. Find the mean for percent of low-income working families and percent of 18–64-year-old…

A: The mean is calculated by summing all the observations divide by the number of sample size. It is a…

Q: The fitted line that results from regressions of the Single Index Model is called: a. The security…

A: Estimating the regression equation of the single index model gives us the security characteristic…

Q: Valley College and Elm College are two local colleges. For each college, the distribution of the…

A: a. The ages of faculty members at Valley college have a population mean of 51 years and a standard…

Q: A quantitative data set has a size 50. At least how many observations lie within 3 standard…

A: Suppose X is a random variable with expectation, μ and standard deviation, σ. Then, for any positive…

Q: In a random sample of 500 teenagers 12 to 17 years old, it was found that 330 have regular access to…

A: A random sample of 500 teenagers 12 to 17 years old; n=500 It was found that 330 have regular access…