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DoNowSTAT10.24

# DoNowSTAT10.24 - to be searched Do Now • Brownie...

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1 Security. There are 20 first­class passengers and 120 coach passengers scheduled on a flight. In addition to the usual security screening, 10% of the passengers will be subjected to a more complete search. a) Describe a sampling strategy to randomly select those to be searched. b) Here is the first­class passenger list and a set of random digits. Select two passengers to be searched, carefully demonstrate your process. 65436 71127 04879 41516 20451 02227 94769 23593 Bergman Cox Fontana Perl Bowman DeLara Forester Rabkin Burkhauser Delli­Bovi Frongillo Roufaiel Castillo Dugan Furnas Swafford Clancy Febo LePage Testut c) Explain how you would use a random number table to select the coach passengers

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Unformatted text preview: to be searched. Do Now: • Brownie people­­see me! • Quiz next class ! Yikes! 2 a) Use stratified sampling to select 2 first­class passengers and 12 from coach. b) Number passengers alphabetically, 01 = Bergman to 20 = Testut. Read in blocks of two, ignoring any numbers more than 20. This gives 65, 43, 67, 11 (selects Fontana), 27, 04 (selects Castillo). c) Number passengers alphabetically 001 to 120. Use the random number table to find three­digit numbers in this range until 12 have been selected. 3 4 5 6...
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• Spring '12
• XU
• Randomness, random number table, firstclass passengers, Bergman Cox Fontana Bowman, Frongillo Castillo Dugan Furnas Clancy Febo LePage

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DoNowSTAT10.24 - to be searched Do Now • Brownie...

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