2012 ap stats project (7)

16
Taste the Rainbow By: Esbeyde and Stephanie Saldana

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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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Page 1: 2012 AP Stats Project (7)

Taste the RainbowBy: Esbeyde and

Stephanie Saldana

Page 2: 2012 AP Stats Project (7)
Page 3: 2012 AP Stats Project (7)

Survey

What is your favorite Skittles flavor? (circle one please)

Grape (purple) Lemon (yellow) Lime

(green) Orange (orange) Strawberry

(red)

Gender: Male or Female :]

Page 4: 2012 AP Stats Project (7)

Is there a preference in flavor?

strawberry

orange

lemon

lime

grape

Page 5: 2012 AP Stats Project (7)

Ho: There is no preference in

flavor.

Ha: There is a preference in

flavor.

Page 6: 2012 AP Stats Project (7)

Chi-SquareGoodness-of-Fit Test

2

2 observed expected

expected

Page 7: 2012 AP Stats Project (7)

Check ConditionsRandom

Independent

Normal

Page 8: 2012 AP Stats Project (7)

n=66 Grape Lemon Lime Orange Strawberry

Observed

9 7 11 7 32Expected (13.2) (13.2) (13.2) (13.2) (13.2)

Page 9: 2012 AP Stats Project (7)

X²= 34.3P≈ 0Df= 5

Page 10: 2012 AP Stats Project (7)
Page 11: 2012 AP Stats Project (7)

• Are gender and choice Skittles flavor

independent?

strawberry

orange

lemon

lime

grape

Page 12: 2012 AP Stats Project (7)

Ho: Gender and

Skittles preference

are independent.

Ha: Gender and

Skittles preference

are not

independent.

Page 13: 2012 AP Stats Project (7)

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

Page 14: 2012 AP Stats Project (7)

•Not enough in the expected count. Conditions were not met.

Page 15: 2012 AP Stats Project (7)

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

Page 16: 2012 AP Stats Project (7)

By: Esbeyde and Stephanie

Saldana