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Any math people here??? -- *updated*
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<blockquote data-quote="Kathy813" data-source="post: 43033" data-attributes="member: 1967"><p>Sheila ~ this is independent probabilities. Guessing one answer right or wrong does not have any effect on the next guess.</p><p></p><p>So there is one favorable outcome out of two possible outcomes on a true/false test, or a 1/2 probability that you guess each question correctly. Since you are guessing on 4 questions you would multiply 1/2 times 1/2 times 1/2 times 1/2 and get a 1/16 probability (6.25%) of guessing the four answers correctly.</p><p></p><p>The fact that there are 20 questions is just extraneous information. </p><p></p><p>As far as abstract thinking, I believe that everyone reaches that at a different point in their lives. In fact, that is the reason that I have a problem with moving Algebra 1 down to younger and younger ages. I think many students are not ready for the abstract thinking needed for higher math and we are setting them up for failure.</p><p></p><p>by the way, lots of people have problems with probability. I hate to teach that chapter since many students have a hard time with it.</p><p></p><p>I hope I helped.</p><p></p><p>~Kathy</p></blockquote><p></p>
[QUOTE="Kathy813, post: 43033, member: 1967"] Sheila ~ this is independent probabilities. Guessing one answer right or wrong does not have any effect on the next guess. So there is one favorable outcome out of two possible outcomes on a true/false test, or a 1/2 probability that you guess each question correctly. Since you are guessing on 4 questions you would multiply 1/2 times 1/2 times 1/2 times 1/2 and get a 1/16 probability (6.25%) of guessing the four answers correctly. The fact that there are 20 questions is just extraneous information. As far as abstract thinking, I believe that everyone reaches that at a different point in their lives. In fact, that is the reason that I have a problem with moving Algebra 1 down to younger and younger ages. I think many students are not ready for the abstract thinking needed for higher math and we are setting them up for failure. by the way, lots of people have problems with probability. I hate to teach that chapter since many students have a hard time with it. I hope I helped. ~Kathy [/QUOTE]
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Any math people here??? -- *updated*
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