Misleading graphs

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Misleading graphs

  1. 1. Misleading Graphs
  2. 2. T h e s e u s u a lly r e p r e s e n t a n a c c u r a t ea n d n o t m is le a d in g g r a p h : 1. Begin scales at 0 or use a broken scale. 2. Space intervals equally to represent equal quantities. 3. Draw the bars in bar graphs as high as the values they represent. 4. Draw equal widths for the bars in bar graphs or pictographs.
  3. 3. C o m p u t e r S a le s 800 700 600 500 400 300 1990 - 1994 - 1996 - 2000 - 2002 - 1993 1995 1999 2001 2004a) W h a t d o e s t h e g r a p h s u g g e s t a b o u t t h e n u m b e r o f c o m p u t e r s in 19 9 It looks like 19 9 5 jthesamount of 1996-1999. a t a) 4 a n d it is twice u t b y l o o k i n g the b a rs ?b) H o w w o u ld y o u c o r r e c t t h e g r a p h s o t h a t it s h o w s t h e d a t a m o r e a c b) u r a tthe y ? c Start e l y-axis at 0 instead of 300.

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