2012 AP Stats Project (7)

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Esbeyde and Stephanie tried to find an association between the color and taste preference of Skittles candies. While there were potential lurking variables, they found interesting results.

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2012 AP Stats Project (7)

  1. 1. Taste the RainbowBy: Esbeyde and Stephanie Saldana
  2. 2. SurveyWhat is your favorite Skittles flavor? (circle one please)Grape (purple) Lemon (yellow) Lime (green) Orange (orange) Strawberry (red) Gender: Male or Female :]
  3. 3. Is there a preference in flavor? ora ng e lim es tra w b e rry g ra pe le m o n
  4. 4. Ho: There is nopreference in flavor. Ha: There is apreference in flavor.
  5. 5. Chi-Square Goodness-of-Fit Test ( observed− expected ) 2χ =∑2 expected
  6. 6. Check Conditions Random Independent Normal
  7. 7. Orange Strawberryn=66 Grape Lemon LimeObserved 9 7 11 7 32Expected (13.2) (13.2) (13.2) (13.2) (13.2)
  8. 8. X²= 34.3 P≈ 0 Df= 5
  9. 9. • Are gender and choice Skittles flavor independent? ora ng e lim etra w b e rry g ra p e le m o n
  10. 10. Ho: Gender and Skittles preference are independent.Ha: Gender and Skittles preference are not independent.
  11. 11. grape lemon orange strawberry lime 2 2 5 5 9Male (3.14) (2.44) (3.83) (2.44) (11.15)Female 7 5 6 2 23 (5.86) (4.56) (7.17) (4.56) (20.85) Male n= 23 Female n=43
  12. 12. • Not enough in the expected count. Conditions were not met.
  13. 13. Potential Errors &Recommendations  Have a larger sample size  Make people eat a different flavor first Give only one of each Skittles flavor  Blind taste test  Provide water
  14. 14. By: Esbeyde and Stephanie Saldana

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