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# STAT 200 Quiz 2 Spring 2016 Page 1 of 4 STAT 200 Introduction to Statistics Name______________________________ Quiz 2: Spring 2016 Instructor...

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STAT 200 Quiz 2 Spring 2016 Page 2 of 4 Record your answers and work on the answer sheet provided. Problem Number Problem 1 (5 pts.) Table 3.15 shows a random sample of musicians and how they learned to play their instruments. Gender Self- taught Studied in School Private Instruction Total Female 12 38 22 72 Male 19 24 15 58 Total 31 62 37 130 Table 3.15 Find P (musician is a female OR is self-taught). 2 (5 pts.) Explain what is wrong with the following statements. Use complete sentences. a. If there is a 60% chance of rain on Saturday and a 70% chance of rain on Sunday, then there is a 130% chance of rain over the weekend. b. The probability that a baseball player hits a home run is greater than the probability that he gets a successful hit. 3 (5 pts.) A baker is deciding how many batches of muffins to make to sell in his bakery. He wants to make enough to sell every one and no less. Through observation, the baker has established a probability distribution. x P(x) 1 0.15 2 0.35 3 0.40 4 0.10 Table 4.21 What is the probability the baker will sell more than one batch? P(x > 1) 4 (5 pts.) A box contains four black pieces of cloth, two striped pieces, and six dotted pieces. A piece is selected randomly and then placed back in the box. A second piece is selected randomly. What is the probability that: a. Both pieces are dotted b. The frst piece is black and the second piece is dotted c. One piece is black and one piece is striped?
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