5.1 Random Variables and Probability Distributions.

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Presentation transcript:

5.1 Random Variables and Probability Distributions

Statistical Experiment

Random Variable

Discrete and Continuous Random Variables

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.

Probability Distribution

Mean and Standard deviation of a Discrete Random Probability Distribution

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 Percentage of Buyers27%31%18%9%15%

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

Assignments Classwork: Pg #1-6 Homework: – : #7-9 – Define 5.1 Vocabulary on page 261 (include examples) – Quiz on Quiz will include vocabulary and problems from the section