Explanation Given: The following table shows the given task. Task Length Dependencies a. Rent power washer 1 hour b. Remove patio furniture from deck 15 minutes c. Power wash deck 16 hours a, b d. Select type of stain (opaque or semitransparent ) and stain color 2 days e. Calculate square footage of area to be stained 15 minutes f. Buy stain 1 hour d, c g. Buy drop cloths, brushes, and rollers 1 hour h. Allow deck to dry 2 days c i. Stain deck 24 hour f, h j. Allow deck to dry 2 days i Calculation: The following PERT chart shows the above task of staining a deck. Figure ( 1 ) As shown in the above PERET chart there are two simultaneously tasks a, and b. So, two workers are required to start the task and complete the task within time. The completion time is calculated as follows, Step 1: Tasks a, b are parallel tasks, so maximum time taken for the tasks a is 1 hour. Step 2: 16 hours for task c, 2 days for task h, 24 hour for task i, 2 days for task j. Thus, the completion time is,

8th Edition

ISBN: 9781305104174

Author: David B. Johnson, Thomas A. Mowry

Publisher: Cengage Learning

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Chapter 9.CR, Problem 62CR

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The time to finish the painting job if there were only one worker.

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Spam filters are built on principles similar to those used in logistic regression. We fit a probability that each message is spam or not spam. We have several variables for each email. Here are a few: to_multiple=1 if there are multiple recipients, winner=1 if the word 'winner' appears in the subject line, format=1 if the email is poorly formatted, re_subj=1 if "re" appears in the subject line. A logistic model was fit to a dataset with the following output: Estimate SE Z Pr(>|Z|) (Intercept) -0.8161 0.086 -9.4895 0 to_multiple -2.5651 0.3052 -8.4047 0 winner 1.5801 0.3156 5.0067 0 format -0.1528 0.1136 -1.3451 0.1786 re_subj -2.8401 0.363 -7.824 0 (a) Write down the model using the coefficients from the model fit.log_odds(spam) = -0.8161 + -2.5651 + to_multiple + 1.5801 winner + -0.1528 format + -2.8401 re_subj(b) Suppose we have an observation where to_multiple=0, winner=1, format=0, and re_subj=0. What is the predicted probability that this message is spam?…

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Ch. 9.1 - In Exercises 1 3, use the following information:...Ch. 9.1 - In Exercises 1 3, use the following information:...Ch. 9.1 - Prob. 3E Ch. 9.1 - Prob. 4E Ch. 9.1 - Prob. 5E Ch. 9.1 - Prob. 6E Ch. 9.1 - In exercise 7-10, determine the number of...Ch. 9.1 - Prob. 8E Ch. 9.1 - In exercise 7-10, determine the number of...Ch. 9.1 - Prob. 10E

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The time to finish the painting job if there were only one worker.

Solution Summary: The author calculates the time to finish the painting job if there were only one worker. Tasks a, b, and c are parallel tasks.

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To find:

The time to finish the painting job if there were only one worker.