2012 AP Stats Project (7)

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