Chapter 4 Review. Continuous or Discrete The number of cheeseburgers sold in the cafeteria. The number of cheeseburgers sold in the cafeteria. Discrete.

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Presentation transcript:

Chapter 4 Review

Continuous or Discrete The number of cheeseburgers sold in the cafeteria. The number of cheeseburgers sold in the cafeteria. Discrete Discrete The weight of every player on a softball team. The weight of every player on a softball team. Continuous Continuous

Figure out the missing number X0123 P(x) ?

Find the P(x<3) X1234 P(x)

Find the mean, SD and Variance Mean = 2 Mean = 2 Standard Deviation = 1.58 Standard Deviation = 1.58 Variance = 2.5 Variance = 2.5 X01234 P(x)

Expected Value Five hundred raffle tickets are sold for $10 each. One winner will receive $1000. Two winners will receive $100. Find the expected value of buying a raffle ticket. Five hundred raffle tickets are sold for $10 each. One winner will receive $1000. Two winners will receive $100. Find the expected value of buying a raffle ticket. -$7.54 -$7.54

What distribution? 30% of all Americans watch football. What is the probability that of the 20 people randomly selected in one week, exactly 12 will watch football? 30% of all Americans watch football. What is the probability that of the 20 people randomly selected in one week, exactly 12 will watch football? Binomial Binomial What is the probability that of the first person who watches football is the fourth person interviewed? What is the probability that of the first person who watches football is the fourth person interviewed?

A die is rolled ten times What is the probability that the number three is rolled exactly four times? What is the probability that the number three is rolled exactly four times? What is the probability that the number three is rolled at most four times? What is the probability that the number three is rolled at most four times? What is the probability that the number three is rolled at least four times? What is the probability that the number three is rolled at least four times?

Mean and Standard Deviation The test tomorrow consists of 15 multiple choice questions. Each question has four choices only one of which is correct. What is the mean and standard deviation of the number of correct answers? The test tomorrow consists of 15 multiple choice questions. Each question has four choices only one of which is correct. What is the mean and standard deviation of the number of correct answers? Mean=3.75 Mean=3.75 Standard Deviation = Standard Deviation = 1.677

Football One particular NFL kicker makes 76% of the field goals he attempts. Find the probability that he misses the first two attempts and makes the third. One particular NFL kicker makes 76% of the field goals he attempts. Find the probability that he misses the first two attempts and makes the third

Teaching I am available for math help first hour in the academic resource room. On average, I have two students visit me every morning. On any given day, what is the probability that exactly five students will come for help? I am available for math help first hour in the academic resource room. On average, I have two students visit me every morning. On any given day, what is the probability that exactly five students will come for help?

Probability Distributions What are the characteristics of a probability distribution? What are the characteristics of a probability distribution?

Unusual? Zach Johnson gets five eagles in one round of the 2008 Master’s tournament. The announcer says getting five or more eagles is not unusual. Use the data below to determine if the announcer’s claim is correct. Zach Johnson gets five eagles in one round of the 2008 Master’s tournament. The announcer says getting five or more eagles is not unusual. Use the data below to determine if the announcer’s claim is correct. Eagles Number of rounds