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BNAD 276 Week 5 Notes

by: madelinef

BNAD 276 Week 5 Notes BNAD 276 001

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Week 5 Notes for BNAD 276
Statistic Inference in Management
Dr. Suzanne Delaney
Class Notes
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This 1 page Class Notes was uploaded by madelinef on Friday September 23, 2016. The Class Notes belongs to BNAD 276 001 at University of Arizona taught by Dr. Suzanne Delaney in Fall 2016. Since its upload, it has received 6 views.


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Date Created: 09/23/16
BNAD 276 Week 5 Notes  Z Scores- tell us the relative location o 100% or 1.0 under curve o 50% or 0.5 is the mean…above and below. o Why do we care about raw scores?  They dictate the x-axis. Gives us the actual number! o For every raw score there’s only 1 z score  Example: mean=100, standard deviation=5 so 1 standard deviation would be at 105 and 95.  If score is within 2 standard deviations (z<2)= not unusual. o Middle 95% o Typical  If z score is more than 2 and less than 3 (2<z<3) it is an unusual score  Outlier= >3 standard deviation (ex: 3.2)  Extreme outlier= >4 standard deviations (ex: 4.3)  Proportions percentiles, percent of  The raw scores and proportions do not correlate but they do when they are converted to Z Scores!  Normal Distribution o Raw scoreZ Scoreprobabilities o Raw score=mean+ (z score)(standard deviation) o Bigger Z’s are getting farther from the mean!  Practice Problem o Mean-30, standard deviation-2 find the raw score of the 75 th percentile.  75-50=25.  30+ (th67)(2)= 31.34 o find the 25 percentile  50-25=25  30+(-0.67)(2)= 28.66


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