PDF Thu Nov 20 2014 09 20 05

Topics: Randomness, Opinion poll, Random number table Pages: 3 (467 words) Published: December 3, 2014
Statistics
Unit 5 Exam Producing Data: Free Response
Directions: Complete the assignment on this paper. If you need additional paper make sure that , you clearly label each page with your name. Your answers for this assignment must include /'
reasons; simply stating the answer without justification will earn partial credit. 1. A game of chance is based on a 0-9 spinner like the one shown two times in succession. The player wins if the larger of the two numbers is greater than 5

a. What constitutes a single play of this game? What are the possible outcomes resulting in win or lose? (6 points)
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b. Describe a correspondence between the random digits from a Random Number Table and outcomes in the game (6 points)

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c. Use the Random Number Table to simulate 20 repetitions Using the table, begin at line 37. Report the proportion of times you win the game (6 points) R-b 55 8 ("A‘-(

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2. Bias is present in each of the following sampling designs. In each case, identify the type of bias involved and state whether you think the sampling frequency obtained is lower or higher than the actual population parameter.

a. A political pollster seeks information about the proportion of American adults that oppose gun control. He asks a SRS of 1000 American adults: "Do you agree or disagree with the following statement: Americans should preserve their constitutional right to keep and bear arms." A total of 910, or 91%, said "agree" (that is, 910 out of the 1000 oppose gun control) (6 points)

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b. A flour company in Minneapolis wants to know what percentage of local' households bake at least twice a week. A company representative calls 500 households during the daytime and finds 50% of them bake at least twice a week. (6...
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