2012 ap stats project (4)

20
FIGHT OF THE FRIES Whose fries will meet their demise? AVILA MENDIETA SANDOVAL

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Karen, Stephanie, and Aaron investigated the association between gender and fries preference. They also drew inference on which brand of fries is most preferable among the three choices.

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Page 1: 2012 AP Stats Project (4)

FIGHT OF THE FRIES

Whose fries will meet their demise?

AVILA MENDIETA SANDOVAL

Page 2: 2012 AP Stats Project (4)

•Originally called Insta-Burger

•Dubbed Burger King in 1955 by Dave Edgerton and James McLamore.

Nutritional FactsLarge Fries

Calories: 500Sodium: 820mgFat: 28g

Large Fries$2.49

Page 3: 2012 AP Stats Project (4)

• Founded in 1948 by Dick and Mac McDonald.

• Franchised by Ray Kroc in 1954

Large Fries$2.19

Nutritional Facts

Large FriesCalories: 500Sodium: 350mgFat: 25g

Page 4: 2012 AP Stats Project (4)

•Founded by Robert O. Peterson in 1951.

• Originally named Topsy’s Drive- In.

Nutritional Facts

Large FriesCalories: 580Sodium: 960mgFat: 28g

Large Fries$2.38

Page 5: 2012 AP Stats Project (4)

Are Gender & French Fry Preference INDEPENDENT?

Ho: Gender and French fry preference are INDEPENDENT.

Ha: Gender and French fry preference are NOT INDEPENDENT.

Page 6: 2012 AP Stats Project (4)

Testing

Page 7: 2012 AP Stats Project (4)
Page 8: 2012 AP Stats Project (4)

Ho: Gender and fries preference are independent.

Ha: Gender and fries preference are not

independent.

Hypotheses

Page 9: 2012 AP Stats Project (4)

We Will Run A…We Will Run A…

Page 10: 2012 AP Stats Project (4)

Conditions Random

Independent

Normal

Page 11: 2012 AP Stats Project (4)

McDonald’s Jack in the Box

Burger King Total

FemaleExpected

88(7.5)(7.5)

1616(15.5)(15.5)

11(2)(2)

25

MaleExpected

77(7.5)(7.5)

1515(15.5)(15.5)

33(2)(2)

25

Total 15 31 4 50

Page 12: 2012 AP Stats Project (4)

CALCULATIONS2 1.1

- 0.58

2

p value

df

Page 13: 2012 AP Stats Project (4)

Because our p-value was high….

We fail to reject the Ho,

we cannot conclude Ha.

Conclusion

Page 14: 2012 AP Stats Project (4)

We Will Run A…We Will Run A…

Page 15: 2012 AP Stats Project (4)

Ho: The 3 brands are equally preferred. (1/3)

Ha: Jack in the Box fries are more preferred. (>1/3)

Hypotheses

Page 16: 2012 AP Stats Project (4)

McDonald’s Jack in the Box

Burger King Total

Observed 1515 3131 44 50

Expected (16.67)(16.67) (16.67)(16.67) (16.67)(16.67) 50

Page 17: 2012 AP Stats Project (4)

CALCULATIONS2 22.12

- 0

2

p value

df

Page 18: 2012 AP Stats Project (4)

Because our p-value was low….

We reject the Ho,

Jack in the Box fries are more preferred.

Conclusion

Page 19: 2012 AP Stats Project (4)

Potential ERRORS•Fries got cold after awhile.

•Not very fresh.•Subjects tried to figure out what restaurant the fries came from and based their decision on their favorite restaurant.

Page 20: 2012 AP Stats Project (4)

FIGHT OF THE FRIES

Whose fries will meet their demise?

AVILA MENDIETA SANDOVAL