Chapter 4, Section 3 Assignment Fl7 (35 points) 1. Notation When randomly select

Question

Chapter 4, Section 3 Assignment Fl7 (35 points) 1. Notation When randomly selecting an adult, A denotes the event of selecting someone with blue eyes. What do P(A) and P(A) represent? 2. Disjoint Events-For a Gallop poll, F is the event of randomly selecting a female, and D is the event of randomly selecting a Democrat. Are events F and D disjoint? Why or why not? For Exercises 3-5, determine whether the two events are disjoint for a single trail. 3. Arriving late for your next statistic class. Missing your next statistics class. 4. Randomly selecting a statistics student and getting one who uses a cell phone calculator in class. Randomly selecting a statistics student and getting one who uses a Dell computer in class. 5. Randomly selecting someone treated with the pain relieving drug Tylenol 3. Randomly selecting someone in a control group given no medication. In Exercises 6-8, use the drug screening data given in the following table. (Fill in the table) Table 1 Pre-Employment Drug Screening Res Positive Test Results Negative Test Results Subject Uses Drugs 213(rue Positive) 7 (False Negative) Subject is Not a Drug User 49 (False Positive) 831 True Negative 6. Drug Screening - If one of the test subjects is randomly selected, find the probability that the subject had a positive test result or a negative test result. 7. Drug Screening - If one of the subjects is randomly selected find the probability that the subject had a negative test result or does not use drugs. 8. Drug Screening - If one of the subjects is randomly selected, find the probability that the subject had a false negative test result or a false positive test result. In Exercises 9-10, find the indicated complements. 9. Find P(A) given that P(A) 0.025

Explanation / Answer

1)

P(A) - probability of selected person having blue eyes.

P(A-) -probability of selected person does not having blue eyes.

2)

F and D are disjoint because occurance of probability of event F doesnot dependent on occurance of probability of event D

3)

Arriving of late for statistics class is cause to depend on missing statistics class therfore events are dependent therfore they are not disjoint.

4)

Randomaly selecting a statistics student and getting one who uses a sell phone calculator in a class is independent on Randomaly selecting a statistics student and getting one who uses a Dell computer in a class.Therefore events are disjoint.

5)

Randomly selecting someone treated with the pain relieving drug Tylenol 3 is independent on Randomly selecting someone in a control group given no medication.Therefore events are disjoint.

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