I dont' really understand this question.

The construction industry has determined that the average time to construct a two floor, family house in Westchester County, New York takes 85 days -- with a deviation of 10 days. Mr. Cox wants to purchase a new home in Westchester County, but his builder has just instructed him that his houses may take 106 days. Mr. Cox's bankers/lenders will guarantee him $400k if his Z-score(based upon a 106 day completion) is normal. (that's the hint) Does Mr. Cox receive the money? Explain.

Could anyone help me out with this please? I'm not sure how to answer this question.

average mean (mu aka, mean from which score X was obtained) = 85
sigma (standard deviation of normal distribution from which X was obtained) = 10
estimated mean (X aka, raw score) = 106

z(obs) = (X - mu)/sigma

z(obs) = (106 - 85)/10

z(obs) = 2.1

check +2.1 in z-score table (which should be in the back of your book) to see if percentile is normal. :) good luck


  1. 👍
  2. 👎
  3. 👁

Respond to this Question

First Name

Your Response

Similar Questions

  1. math

    Given that a:b = 8:5 and b:c= 3:4 find the ratio a:b:c Give your answer in its simplest form. Show all working out. My work: 1) 5 and 3 both equal to b. 2) 8+5=13/2= 11.5 3)3+4=7/2=3.5 4)11.5+3.5= 15 All my working shown I dont

  2. statics

    I don't understand what this question ask for. I think it want me to take 7.2*10^-3 and rewrite it as 0.00072. Am i right? The momentum of an object is determined to be 7.2×10-3 kg⋅m/s. Express this quantity as provided or use

  3. Calculus

    If f(x) is differentiable for the closed interval [−1, 4] such that f(−1) = −3 and f(4) = 12, then there exists a value c, −1< c < 4 such that a)f'(c)=3 b)f'(c)=0 C)f(c)=-15 d)f(c)=3 I understand that you are supposed to

  4. Economics

    Questions: Are the following workers more likely to experience short-term or long-term unemployment? Explain. a. A construction worker laid off because of bad weather. b. A manufacturing worker who loses her job at a plant in an

  1. Science, Example PLZ?

    Using an example, explain how being able to understand scientific principles and think scientifically can help you solve problems and answer questions in your everyday life. Have Any Example? I Sure Dont Have Any... Can You Give

  2. Calculus

    The table shows the position of a cyclist. t (seconds) 0 1 2 3 4 5 s (meters) 0 1.6 4.6 10.4 17.8 25.2 (a) Find the average velocity for the time period [1, 3]. ? m/s (b) Find the average velocity for the time period [2, 3]. ? m/s

  3. Calc Physics

    The velocity as a function of time for an asteroid in the asteroid belt is given by v(t)= vo e^(-t/to)i + (vo t/ 2 to) j with vo and to constants. Use ti = 0 as the initial time, and tf = 472 s as the final time. The values for

  4. Microeconomics

    A perfectly competitive industry has a large number of potential entrants. Each firm has an identical cost structure such that long run average cost is minimized at an output of 10 units (qi=10 ). The minimum average cost is R5

  1. American History

    Which are reasons that the United States became a leader of industry after Reconstruction? (Select all that apply.) growth of factory production growth of mining expeditions growth of railroad construction growth of the automobile

  2. math

    ms. sue, i really need help with this question i dont understand it For all real numbers b and c such that the product of c and 3 is b, which of the following expressions represents the sum of c and 3 In terms of b A. b+3 B. 3b+3

  3. math

    okay so i really need help please help i dont understand how to do this ive asked my teacher and i still dont understand is there an easier way to do this to where i could understand? Brayden, Howard, and Vincent are on the

  4. Managerial Finance

    Compare the performance of East Coast Yachts to the industry as a whole. For each, comment on why it might be viewed as positive or negative relative to the industry. Suppose you create an inventory ratio calculated as inventory

You can view more similar questions or ask a new question.