You need to know this stuff!

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Presentation transcript:

You need to know this stuff! Review of Probability You need to know this stuff!

A music collection includes 10 Rock CDs, 8 country CDs, 5 classical CDs, and 7 hip hop CDs. What is the probability that a CD randomly selected from the collection is a classical CD? The easy stuff…

A music collection includes 10 Rock CDs, 8 country CDs, 5 classical CDs, and 7 hip hop CDs. What is the probability that a CD randomly selected from the collection is a classical CD or a hip hop CD? The “or” stuff…

What is the probability of rolling either an even number or a multiple of 3 when rolling a standard number cube? The “overlap” stuff…

A music collection includes 10 Rock CDs, 8 country CDs, 5 classical CDs, and 7 hip hop CDs. What is the probability that two CDs randomly selected from the collection are a classical CD AND a hip hop CD? The “and” stuff…

Probability Distribution Complete the probability distribution for the chart below. Type of Music Frequency Probability Rock 10 Hip Hop 7 Country 8 Classical 5 Alternative 6 Other 4 Probability Distribution

Two-Way Tables and Conditional Probability Supports Issue Does Not Support the Issue Democrat 24 36 Republican 27 33 P(democrat and supports the issue) = P(democrat | supports the issue) = Two-Way Tables and Conditional Probability

Shots Only Shots and Check-up Dogs 0.31 0.23 Cats 0.26 0.20 What is the probability that an animal chosen at random is a dog, given that the treatment was shots only? 𝑃 𝐵 A = 𝑃(𝐴 𝑎𝑛𝑑 𝐵) 𝑃(𝐴)