Stat230-M1-Solutions

Stat230-M1-Solutions - Statistics 230, Fall 2010 Midterm...

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Statistics 230, Fall 2010 Midterm Test 1 October 14, 2010 Duration: 75 Minutes Family Name: Given Name: ID #: Signature: Section: B 001 - La Croix (12:30-1:20) B 002 - Moshksar (12:30-1:20) B 003 - Struthers (10:30-11:20) B 004 - La Croix (1:30-2:20) B 005 - Moshksar (1:30-2:20) Instructions: 1. Please indicate your section above. 2. You may use a pink tie calculator for this exam, but a calculator is not required. 3. Show your work where possible. Part marks cannot be awarded for work that is not shown. 4. If you experience diFcultly with one part of a question, but would like to use its answer in a subsequent part, use an unknown to represent the answer, and show how you would ±nish the problem if you had this extra information. 5. You may tear o² the attached piece of scrap paper. It should not be handed in. 1. [2 marks] Let A and B be two events with P( A ) = 0 . 4 and P( B ) = 0 . 3. ³ind P( A B ) if (a) A and B are mutually exclusive. (b) A and B are independent. 2. [3 marks] A researcher has heard that 10% of students have cheated on an examination, and wishes to con±rm this result with a con±dential study. The researcher prepares a box
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Stat230-M1-Solutions - Statistics 230, Fall 2010 Midterm...

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