Question

In: Math

The mean time required to complete a certain type of construction project is 52 weeks with...

The mean time required to complete a certain type of construction project is 52 weeks with a standard deviation of 3 weeks. Answer questions 4–7 using the preceding information and modeling this situation as a normal distribution.

  1. What is the probability of the completing the project in no more than 52 weeks?
  1. 0.25
  2. 0.50
  3. 0.75
  4. 0.05
  1. What is the probability of the completing the project in more than 55 weeks?
  1. 0.1587
  2. 0.5091
  3. 0.7511
  4. 0.0546
  1. What is the probability of completing the project between 56 weeks and 64 weeks?
  1. 0.2587
  2. 0.3334
  3. 0.5876
  4. 0.0911
  1. What is the probability of completing the project within plus or minus one standard deviation of the mean?
  1. 0.951
  2. 0.852
  3. 0.759
  4. 0.683

Solutions

Expert Solution


Related Solutions

The mean time required to complete a certain type of construction project is 52 weeks with...
The mean time required to complete a certain type of construction project is 52 weeks with a standard deviation of 3 weeks. Answer questions 4–7 using the preceding information and modeling this situation as a normal distribution. 4. What is the probability of the completing the project in no more than 52 weeks? a) 0.25 b) 0.50 c) 0.75 d) 0.05 5. What is the probability of the completing the project in more than 55 weeks? a) 0.1587 b) 0.5091...
The time required to complete a project is normally distributed with a mean of 78 weeks...
The time required to complete a project is normally distributed with a mean of 78 weeks and a standard deviation of 10 weeks. The construction company must pay a penalty if the project is not finished by the due date in the contract. If a construction company bidding on this contract wishes to be 90 percent sure of finishing by the due date, what due date (project week #) should be negotiated?
The time that takes to complete a certain type of construction projects has a mean of...
The time that takes to complete a certain type of construction projects has a mean of 35.5 months and a standard deviation of 1.5 months. a. According to the Tchebysheff’s theorem, at least what percentage of these projects must have taken between 26.5 months and 44.5 months to complete? b. If in addition we are told that the relative frequency curve for the completion times is a bell-shaped curve, then approximately what percentage of these projects would take more than...
An analyst wanted to predict the time required to complete a construction project using four variables...
An analyst wanted to predict the time required to complete a construction project using four variables - size of the contract ?1x1 (in $1000 units), number of workdays adversely affected by the weather ?2x2, number of subcontractors involved in the project ?4x4, and a variable ?3x3 that measured the presence ( ?3=1x3=1) or absence ( ?3=0x3=0) of a workers' strike during the construction. Fifteen construction projects were randomly chosen, and each of the four variables as well as the time...
The Time Numbers represent weeks a. Find the mean time for completion of the project b....
The Time Numbers represent weeks a. Find the mean time for completion of the project b. Find the probability that the project will be completed two weeks earlier than the mean time. Preceding Optimistic Most Likely Pessimistic Activity Activity Time Time Time A. Write Book 10 13 17 B. Design Book Cover A 1 1 1 C. Edit Manuscript A 3 6 9 D. Check Editing C 2 3 6 E. Accept Design B 1 1 1 F. Copy Edit...
Construction labor is budgeted on the basis of 52 weeks per year. Construction labor is budgeted...
Construction labor is budgeted on the basis of 52 weeks per year. Construction labor is budgeted on the basis of 40 hours per work week (Assuming overtime premiums) A contractor employs his labor force for the full year of 1,676 hours with a company policy that recognizes the following: 5 paid holidays per year.- 103 hours of paid leave per year, per employee. For estimating purposes what are standard costs/hours for how many work hours are available for productive work...
1. The time required by a mechanic in a bicycle shop to assemble a certain type...
1. The time required by a mechanic in a bicycle shop to assemble a certain type of bicycle may be looked upon as a random variable with a mean distribution of 20.5 minutes and a standard deviation of 2.3 minutes. find the probabilities that the time required to assemble a bicycle is: a. at least 20 minutes b. at most 19.0 minutes c. between 2.0 and 21.0 minutes d. between 18.0 and 20 minutes
Suppose a new construction company claims that, the mean time to complete a commercial complex is...
Suppose a new construction company claims that, the mean time to complete a commercial complex is around 15 months. A sample of 41 construction companies are randomly selected and it is found that the mean time taken by them to complete a commercial complex building was 12.5 with a standard deviation of 2.5 months. At 1% level of significance, do you have sufficient evidence to conclude that the new construction company claim true? What is the Null hypothesis (H0); Alternate...
The mean incubation time for a type of fertilized egg kept at a certain temperature is...
The mean incubation time for a type of fertilized egg kept at a certain temperature is 20 days. Suppose that the incubation times are approximately normally distributed with a standard deviation of 1 day. Complete parts​ (a) through​ (e) below. ​(a) Draw a normal model that describes egg incubation times of these fertilized eggs. Choose the correct graph below. Click here to view graph b.LOADING... Click here to view graph d.LOADING... Click here to view graph a.LOADING... Click here to...
The mean incubation time for a type of fertilized egg kept at a certain temperature is...
The mean incubation time for a type of fertilized egg kept at a certain temperature is 25 days. Suppose that the incubation times are approximately normally distributed with a standard deviation of 1 day. (B.) Find and interpret the probability that a randomly selected fertilized egg takes over 26 days to hatch. (C.)Find and interpret the probability that a randomly selected fertilized egg hatches between 23 and 25 days.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT