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Bellwork 11/19/18

Bellwork 11/19/18. A recent US News survey found the following distribution of the number of cell phones per household Find the mean and standard deviation. All Probability Distributions. Discrete. Continuous. Normal. Binomial. Geometric. Binomial Prob Distributions Example.

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Bellwork 11/19/18

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  1. Bellwork 11/19/18 A recent US News survey found the following distribution of the number of cell phones per household • Find the mean and standard deviation

  2. All Probability Distributions Discrete Continuous Normal Binomial Geometric

  3. Binomial Prob Distributions Example In a family, each of the children has a 0.25 chance of having type O blood. The parents in one such family had 5 children. Probability that exactly 3 are type O? Should the parents be surprised if more than 3 are type O?

  4. GeomProb Distributions Example In a family, each of the children has a 0.25 chance of having type O blood. Imagine that the parents decide to have children UNTIL a child with type O is born. Probability that the parents will have 2 children? Probability that the parents will have more than 3 children?

  5. A high school exit test based on the national Common Core Standards is being examined to see if scores can predict college success. Students take tests in four areas: Math, English, Science and Social Studies. The composite score is the sum of the area scores. The scores in each area are approximately normally distributed.

  6. a) What is the probability that a randomly selected student will score above 600 on the Science portion of this high school exit test? • b) The composite score is the sum of the area scores. What is the mean and standard deviation of the composite score? • c) One teacher wants to help tutor students that have a score of less than 2000. Do you think it likely that she will have students to tutor? Justify your answer. °

  7. The human body temperature is approximately normally distributed with a mean of 98.2°F and standard deviation of 0.62°F. Use the conversion of C = 0.556(F) – 17.778 and • Find the mean and standard deviation of this distribution in Celsius. • Find the probability that the temperature is over 37°C

  8. You can get one of eight action figures from the Disney movie Frozen in boxes of Super Crunchy Puffs. Your little cousin really wants the reindeer Sven figure. Assuming that the action figures are randomly placed in all boxes of Super Crunchy Puffs, • What is the probability that the number of boxes your aunt has to buy until a Sven appears is exactly 8? • What is the probability that the number of boxes your aunt has to buy until a Sven appears will be more than six?

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