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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: Box 001 - La Croix (12:30-1:20) Box 002 - Moshksar (12:30-1:20) Box 003 - Struthers (10:30-11:20) Box 004 - La Croix (1:30-2:20) Box 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 difficultly 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 finish the problem if you had this extra information. 5. You may tear off 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. Find 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 confirm this result with a confidential study. The researcher prepares a box

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

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