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# homework help me please

• From Mathematics, Statistics
• Due on 24 Feb, 2016 04:29:00
• Asked On 24 Feb, 2016 02:47:14
• Due date has already passed, but you can still post solutions.
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25. You are to participate in an exam for which you had no chance to study, and for that reason cannot do anything but guess for each question (all questions being of the multiple choice type, so the chance of guessing the correct answer for each question is 1/d, d being the number of options (distractors) per question; 220 so in case of a 4-choice question, your guess chance is 0.25). Your instructor offers you the opportunity to choose amongst the following exam formats: I. 6 questions of the 4-choice type; you pass when 5 or more answers are correct; II. 5 questions of the 5-choice type; you pass when 4 or more answers are correct; III. 4 questions of the 10-choice type; you pass when 3 or more answers are correct. Rank the three exam formats according to their attractiveness. It should be clear that the format with the highest probability to pass is the most attractive format. Which would you choose and why?

7.You flip a coin three times. (a) What is the probability of getting heads on only one of your flips? (b) What is the probability of getting heads on at least one flip?

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## [Solved] Statistics Help

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• Submitted On 24 Feb, 2016 05:44:59
I. 6 questions of the 4-choice type; you pass when 5 ...
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