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Stats Lecture 2

by: Kaley Manspeaker

Stats Lecture 2 k300

Kaley Manspeaker
GPA 3.8

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About this Document

These notes cover what will be on the first exam!
Elementary Statistics
Curtis Ramsey
Class Notes
25 ?




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This 1 page Class Notes was uploaded by Kaley Manspeaker on Saturday January 30, 2016. The Class Notes belongs to k300 at Indiana University Purdue University - Indianapolis taught by Curtis Ramsey in Spring 2016. Since its upload, it has received 34 views. For similar materials see Elementary Statistics in Stats at Indiana University Purdue University - Indianapolis.


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Date Created: 01/30/16
Elementary  Statistics   Lecture  2                               Definitions:       • Data  collected  in  original  form  is  called  raw  data     • A  frequency  distribution  is  the  organization  of  raw  data  in  table  form,  using   classes  and  frequencies     • Categorical  frequency  distribution  is  nominal  or  ordinal  level  data  that  can   be  placed  in  categories     • Grouped  frequency  distributions  are  used  when  the  range  of  data  is  large     • The  smallest  and  largest  possible  data  values  in  a  class  are  the  lower  and   upper  class  limits     • Boundary-­‐  line  between  limits       Most  common  types  of  graphs  for  data:  Histogram,  Frequency  Polygon,  Ogive,  Bar   graphs,  Pie  charts,  Stem  and  Leaf  plot,  and  Scatter  plot.     • Histogram:  Frequency  and  boundary  of  the  classes     • Frequency  Polygon:  Use  lines  that  connect  points  plotted  for  the   frequencies  at  the  class  midpoints     • Ogive:  Represents  cumulative  frequencies       • Relative  frequency  graphs:  proportions  are  used  instead  of  frequencies     • Scatter  plot:  Order  pairs  of  data  and  see  if  relationship  exists  between  two   variables     Shapes  of  Graphs:  Bell-­‐shaped,  J-­‐shaped,  Uniform,  and  Reverse  J-­‐shaped     • Class  Midpoint:  Lower  class  and  upper  class  divide  by  two     • Class  Width:  Upper-­‐Lower  


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