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5.1 Random Variables and Probability Distributions.

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Presentation on theme: "5.1 Random Variables and Probability Distributions."— Presentation transcript:

1 5.1 Random Variables and Probability Distributions

2 Statistical Experiment

3 Random Variable

4 Discrete and Continuous Random Variables

5 Discrete or Continuous Measure the time it takes a student selected at random to register for the fall term. Count the number of bad check drawn on Bank of America on a day selected at random.

6 Probability Distribution

7 Mean and Standard deviation of a Discrete Random Probability Distribution

8

9

10 Mean and Standard Deviation Are we influenced to buy a product by an ad we saw on TV? National Infomercial Marketing Association determined the number of times buyers of a product watched a TV infomerical before purchasing the product. Number of Times Buyers Saw Infomercial 12345 Percentage of Buyers27%31%18%9%15%

11 Solution x (number of viewings) P(x)xP(x)x - μ(x – μ)²(x – μ)²P(x)

12 Assignments Classwork: Pg. 215-216 #1-6 Homework: – 216-217: #7-9 – Define 5.1 Vocabulary on page 261 (include examples) – Quiz on 2-14-11. Quiz will include vocabulary and problems from the section


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