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: A union of restaurant and foodservice workers would like to estimate this year's mean hourly wage u…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: Suppose a quarterback's completion percentage for the season is 67.2%. Based on relative frequency,…

A: We have to find Based on relative frequency, is it more likely that he will complete his next two…

Q: very observation in a data set is multiplied by a constant k. What best describes the effect on…

A: Given : Every observation in a data set is multiplied by a constant k Let the observations be :…

Q: A health psychologist is interested in the potential effect that a change in career focus can have…

A: Let the systolic blood pressure be denoted by X. Given: X~N142, 132 sample size (n) used: 23 sample…

Q: The measurement of head circumference is closely tracked in pediatric medicine.  Microcephaly…

A: From the given information, The average cranium for an adult female in Turkey measures 54.57 cm in…

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: Joan's Nursery specializes in custom-designed landscaping for residential areas. The estimated labor…

A: Given information- Population mean, μ = 2 hours Significance level, α = 0.05 We have given a sample…

Q: Casey Deesel is a sports agent negotiating a contract for Titus Johnston, an athlete in the National…

A: Given Information: Casey has gathered data on 506 NFL athletes who have recently signed new…

Q: Americans spend billions on veterinary care each year. According to the APPA National Pet Owners…

A: Given  X~ N(mu=670,sigma^2=290^2), n=100 We want to find (1) P(X>750)= ? (2) P(Xbar>750)= ?

Q: Q2. The US Energy Information Administration compile data on energy consumption and publishes its…

A: Given Information:  Population mean (u) = 114 BTU  Sample size (n) = 50

Q: Google is analyzing the decision to launch a new Pixel phone. The development costs are estimated to…

A:

Q: A boat capsized and sank in a lake. Based on an assumption of a mean weight of 138 ​lb, the boat was…

A: Given, A boat capsized and sank in a lake. Based on an assumption of a mean weight of 138 ​lb, the…

Q: A boutique fitness studio would like to test whether their program is effective at weight loss. They…

A:

Q: Researchers claim that the surface temperature of the world's oceans mainly changes with changing…

A: The purpose of this experiment is to examine the claim that the surface temperature of the world's…

Q: Explain the importance of direct and indirect standardised death rates.

A:

Q: A report from the National Center for Health Statistics for 2010 showed that 20% of the adult…

A: The objective of this question is to find the average number of adult smokers in a sample of 25…

Q: 1) A large, national study conducted in 2007 reported that the mean systolic blood pressure for…

A: The sample mean  x¯=135 The sample standard deviation s=10.2 The sample size n=100 The level of…

Q: A researcher wonders whether people who regularly read the Harry Potter series are happier than…

A: A paired samples t-test is used to determine whether the population mean difference of two dependent…

Q: polling organization reported data from a survey of 2000 randomly selected Canadians who carry debit…

A: The following information has been provided: Hypothesized Population Mean (\mu)(μ) = 1010…

Q: A polling organization reported data from a survey of 2000 randomly selected Canadians who carry…

A: From the provided information, Sample size n = 2000 Sample mean x̄= 9.13 Standard deviation s = 7.20…

Q: IIS IS During one shift, the express lane clerk monitored how many times customers violated the "10…

A: Given From given graph

Q: patient. The mean difference is calculated Md= -4 with SS= 16.  a. Using symbols, state the…

A: )

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: A polling organization reported data from a survey of 2000 randomly selected Canadians who carry…

A:

Q: health psychologist is interested in the potential effect that a change in career focus can have on…

A:

Q: The speeds of cars traveling on UK motorways are normally distributed with mean 96 kilometers per…

A: We have given that.   X~N( μ , ?^2 )   μ =96 , ? = 10   Z-score =( x - μ )/?

Q: 1. Statistics teacher realize that his students keep using cell phones during the class. Then he did…

A:

Q: Past records suggest that the mean annual income, u, of teachers in state of Utah is greater than or…

A: State the hypotheses.   Determine the type of test statistic used.   The type of test statistic…

Q: The average chef at a restaurant earns $17 an hour with a deviation of $1.75. What are the chances…

A:

Q: An airline claims at the Average number of years of experience of its pilots is 18.3 years. In a…

A:

Q: According to a dietary study. high sodium in take may be related to ucers. stomach cancer, and…

A:

Q: Joan's Nursery specializes in custom-designed landscaping for residential areas. The estimated labor…

A: Given information- Population mean, μ = 2 hours Sample size, n = 10 We have given the actual times…

Q: Provide the null and alternative hypotheses used to address these problems. Make sure that your…

A: It is needed to find the null and alternative hypotheses.

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: 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: A polling organization reported data from a survey of 2000 randomly selected Canadians who carry…

A:

Q: According to the U.S. Census, the average adult woman is the United States is 65 inches tall and the…

A: Given X is normal Distributed with mean µ = 65.0 and standard deviation σ = 3.0 Need to find Z score…

Q: Suppose that the lengths of pregnancies are normally distributed with a mean of 271 days and a…

A:

Q: A random sample of 160 commercial customers  revealed that 32  had paid their accounts within a…

A: For normality condition we have : (1) n*p  >10 (2) n*(1-p)  >10 where, n: sample size p :…

Q: A researcher has found a strong relationship between level of education and income and concludes…

A: Introduction: The error in the conclusion must be identified.

Q: A study of Brown Bag Company's payment practices showed that the company pays its vendors 20 days…

A: Given particulars are shown below: Mean value = 20 days Standard deviation(SD) = 5 days Expected…