2012 ap stats project (4)
DESCRIPTION
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.TRANSCRIPT
FIGHT OF THE FRIES
Whose fries will meet their demise?
AVILA MENDIETA SANDOVAL
•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
• 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
•Founded by Robert O. Peterson in 1951.
• Originally named Topsy’s Drive- In.
Nutritional Facts
Large FriesCalories: 580Sodium: 960mgFat: 28g
Large Fries$2.38
Are Gender & French Fry Preference INDEPENDENT?
Ho: Gender and French fry preference are INDEPENDENT.
Ha: Gender and French fry preference are NOT INDEPENDENT.
Testing
Ho: Gender and fries preference are independent.
Ha: Gender and fries preference are not
independent.
Hypotheses
We Will Run A…We Will Run A…
Conditions Random
Independent
Normal
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
CALCULATIONS2 1.1
- 0.58
2
p value
df
Because our p-value was high….
We fail to reject the Ho,
we cannot conclude Ha.
Conclusion
We Will Run A…We Will Run A…
Ho: The 3 brands are equally preferred. (1/3)
Ha: Jack in the Box fries are more preferred. (>1/3)
Hypotheses
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
CALCULATIONS2 22.12
- 0
2
p value
df
Because our p-value was low….
We reject the Ho,
Jack in the Box fries are more preferred.
Conclusion
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.
FIGHT OF THE FRIES
Whose fries will meet their demise?
AVILA MENDIETA SANDOVAL