lecture 13 - Grade Distribution 70 60 50 40 30 20 10 0 0-60...

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Grade Distribution 0 10 20 30 40 50 60 70 80 90 100 0-60 61-70 71-80 81-90 91-100
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Grades you see “not included in grade” We have not yet included the extra credit in the exam grade, so it is not complete. This is the exam grade without extra credit
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Curve?
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How curves work Average grade should be a B- or C So, if the average was 60%, I would add 15 points to all scores to make the average a 75 Here, I would have to subtract 16 points from every score to make the average a C
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Reason for missing questions Didn’t know answer Didn’t read question carefully Answer may be a true statement, but does not answer the question – no credit Didn’t read answer and it was not understandable Arithmetic
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My office hours today are cancelled, but Soledad will be available from 12-1 today
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Grading Policy First: please check our addition and make sure that there is not a mistake in your grade If you are not sure why you missed a question, ask during office hours Note: you will not win most arguments Any questions are to be asked in person Do not just say “I want a re-grade”
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The next exam Material more difficult Average is always about 10 points lower
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The Paradox of Sex What is it? Costs versus benefits of sexual reproduction Sex and variation Variation and adaptability Adaptability and selection
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Context: compare parthenogenesis with sexual reproduction Parthenogenesis is a form of reproduction in which an unfertilized egg develops into a new adult individual. Relatively common among insects
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lecture 13 - Grade Distribution 70 60 50 40 30 20 10 0 0-60...

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