2012 ap stats project (7)
DESCRIPTION
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.TRANSCRIPT
Taste the RainbowBy: Esbeyde and
Stephanie Saldana
Survey
What is your favorite Skittles flavor? (circle one please)
Grape (purple) Lemon (yellow) Lime
(green) Orange (orange) Strawberry
(red)
Gender: Male or Female :]
Is there a preference in flavor?
strawberry
orange
lemon
lime
grape
Ho: There is no preference in
flavor.
Ha: There is a preference in
flavor.
Chi-SquareGoodness-of-Fit Test
2
2 observed expected
expected
Check ConditionsRandom
Independent
Normal
n=66 Grape Lemon Lime Orange Strawberry
Observed
9 7 11 7 32Expected (13.2) (13.2) (13.2) (13.2) (13.2)
X²= 34.3P≈ 0Df= 5
• Are gender and choice Skittles flavor
independent?
strawberry
orange
lemon
lime
grape
Ho: Gender and
Skittles preference
are independent.
Ha: Gender and
Skittles preference
are not
independent.
grap
e
lemo
nlim
e
oran
ge
strawberr
y
Mal
e
2(3.14)
2(2.44)
5(3.83)
5(2.44)
9(11.15)
Femal
e
7(5.86)
5(4.56)
6(7.17)
2(4.56)
23(20.85)Male n= 23 Female n=43
•Not enough in the expected count. Conditions were not met.
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
By: Esbeyde and Stephanie
Saldana