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mean variance and sd

mean variance and sd - Quantitative Methods in...

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  ©   John M. Ackroff 2008   Quantitative Methods in Psychology  (01-830-200) Dr. John Ackroff www.rci.rutgers.edu/~ackroff/QM   Lectures:  Tuesdays and Thursdays, 6:40 – 8:00 PM, HLL  114 Recitation Sections (starting Feb 4): Section 10:  Tuesdays, 3:20 – 4:40 PM, SEC 210 Section 11:  Tuesdays, 5:00 – 6:20 PM, SEC 209 Section 12:  Thursdays, 5:00 – 6:20 PM, SEC 209 Section 13:  Thursdays, 8:10 – 9:30 PM, SEC 117
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  ©   John M. Ackroff 2008  A few leftovers Grading Cutoff-points for each grade (A, B+, B, …)  are determined for each TAs sections by  looking at the distribution of total point  scores at the end of the semester. Extra credit points are added to you total  after  we make these determinations.
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  ©   John M. Ackroff 2008  Chapter 1 – The Basics The Mean, the Number of Observations,  the Variance, and the Standard  Deviation
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  ©   John M. Ackroff 2008  Where do we start? Observations -> data Collection:  data set Distribution  Statistics organize and explain the data Descriptive statistics summarize Inferential statistics allow us to draw conclusions Samples vs. populations Representativeness
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  ©   John M. Ackroff 2008
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