1 / 18

Unit 5: Probability

Unit 5: Probability. Basic Probability. Sample Space. Set of all possible outcomes for a chance experiment. Example: Rolling a Die. Probability Model. It is a description of some chance process that consists of two parts A sample space (S) A probability for each outcome. Tree Diagram.

stacyg
Download Presentation

Unit 5: Probability

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Unit 5: Probability Basic Probability

  2. Sample Space Set of all possible outcomes for a chance experiment. Example: Rolling a Die

  3. Probability Model • It is a description of some chance process that consists of two parts • A sample space (S) • A probability for each outcome

  4. Tree Diagram A technique for listing the outcomes in a sample space. It contains branches showing what can happen on different trials.

  5. Draw diagram of all possibilities of test performance on three True/False questions.

  6. Draw the tree diagram for winning the best 2 out of 3 games.

  7. Imagine rolling two fair, six-sided dice – one that is red and one that is green. Give a probability model for this chance process.

  8. Event • It is a subset of the sample space. • It is usually designated by capital letters, like A, B, C, and so on.

  9. Consider flipping 2 coins A = both tails B = at least one head Find P(A) P(B)

  10. Basic Rules of Probability – (don’t write yet)

  11. Complement

  12. Mutually Exclusive (Disjoint) • Two events are mutually exclusive (disjoint) if they have no outcomes in common and so can never occur together.

  13. Basic Probability Rules

  14. Find the probability: • Rolling a 5 • Choosing a girl in this class • Drawing a king

  15. Two marbles are pulled from a bag holding one red, one white, one blue, and two green marbles. A={the blue marble is drawn} B={a green marble is drawn}

  16. Distance learning courses are rapidly gaining popularity among college students. Randomly select an undergraduate student who is taking a distance-learning course for credit, and record the student’s age. Here is the probability model. • Show that this is a legitimate probability model. • Find the probability that the chosen student is not in the traditional college age group (18 to 23).

  17. Choose an American adult at random. Define two events:A = the person has a cholesterol level of 240 mg per deciliter of blood (mg/dl) or above (high cholesterol).B = the person has a cholesterol level of 200 to 239 mg/dl (bordering high cholesterol)According to the American Heart Association, P(A) = 0.16 and the P(B) = 0.29. • Explain why events A and B are mutually exclusive. • What is P(A and B)? • What is P(A or B)? • If C is the event that ther person chosen has normal cholesterol (below 200 mg/dl), what is P(C)?

  18. Homework

More Related