McDonald

1
McDonalds vs. WendysWho Gives You More for
your Money

• By Brandon Fell
• and Jamie Weltz

2
McDonalds Background

• Worlds largest chain of fast food restaurants
• Started by the two brothers Richard and Maurice
  as a single hamburger stand in San Bernardino,
  California
• First location was 14th and E Streets in 1948
• Sold the restaurant chain to Ray Kroc for 2.7
  million dollars

3
Wendys Background

• First Wendys old fashioned Hamburger restaurant
  opened in downtown Columbus Ohio in 1969
• Founded by Dave Tomas and named after his
  daughter Melinda Wendy Thomas (Wendy a nickname
  given by her brothers and sisters
• Dave Thomas worked with the KFC owner Colonel
  Sanders

4
Purpose

• The purpose of our project is to research which
  fast food corporation overfills their large fry
  more. Each company has their own set weight of
  what a proper large fry should weigh. For Wendys
  it is 184 grams and McDonalds it is 170 grams.
  We are going to test which store overfills their
  large fry more compared to the claimed amount.

5
Purpose

• We are also going to test which company has
  larger hamburgers compared to their claimed
  weights of, McDonalds at 33 grams and Wendys at
  37 grams.

6
The Process

• We decided to randomly choose which McDonalds
  and Wendys we would conduct our project on,
  within reasonable distance.
• We ordered 10 fries from each location, and five
  burgers to weigh.
• For our two sample t-test we tested the
  difference between the actual weight and the
  claimed weight to see if McDonalds indeed
  overflowed their food more then Wendys.

7
Wendys Data

• Wendys Lansdale Wendys Warrington
• 216.5 -189
• 191 -201
• 185 -187
• 209.5 -193
• 187.9 -196
• 191 -188
• 187 -200
• 193 -187
• 204 -191
• 201 -193

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Wendys Data

• Wendys Doylestown
• 189
• 201
• 187
• 193
• 196
• 192
• 197
• 196
• 188
• 194

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Wendys 1-Var Stats

• 194.13
• Sx 7.2426
• Five Number Summary
• Min 185
• 188
• Median 193
• 197
• Max 216.5 180 185 190
  195 200 205 210 215 220

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One Sample T-Test

• 1.SRS 1.assumed
• 2.normal population or 2.30 30
• n 30

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One Sample T-Test Wendys

• Ho
• Ha
• Test Statistic
• 7.661

• P(t gt 7.661) 9.519

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Conclusion

• We reject the Ho because the p-value is less than
  alpha level of .05. We have sufficient evidence
  that the mean weight of the Wendys large fry is
  greater then 184 grams.
• This shows that, indeed the Wendys large are
  generally overflowed.

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Wendys Confidence Interval
( 191.29, 196.97 )
We are 96 confident the mean weight of the
Wendys large fry is between 191.29 grams and
196.97 grams.
14
McDonalds Data

• McDonalds Chalfont McDonalds Warrington
• 171 -187
• 173.2 -216
• 170.6 -186
• 187 -200
• 179 -204.5
• 183 -201.6
• 191 -200
• 176 -198
• 184 -184
• 179 - 192

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McDonalds Data

• McDonalds Doylestown
• 175.2
• 181
• 172
• 192
• 179
• 180
• 179.6
• 193
• 191
• 176

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McDonalds One-Var Stats
185.523
Sx 10.9204

• 5- Number Summary
• Min170.6
• 176
• -Median184
• 192
• Max 210

170 175 180 185 190 195 200 205 210
17
McDonalds One Sample T Test

• 1.SRS 1.assumed
• 2.normal population or 2.30 30
• n 30

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McDonalds T-Test

• Ho M 170
• Ha M gt 170
• Test Statistic

7.786
P( t gt 7.786) 6.91
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Conclusion

• We reject the Ho because the p-value is less than
  alpha level of .05. We have sufficient evidence
  the mean weight of a McDonalds large fry is
  greater than 170 grams.
• In this test we, as well, proved that the
  McDonalds large fries are overflowed.

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McDonalds Confidence Interval
( 181.24, 189.81 )
We are 96 confident the mean weight of the
McDonalds large fry is between 181.24 grams and
189.81 grams.
21
Two Sample T-Test

• Assumptions
• 1. Two independent SRS
• 2. Two Normal Populations
• or
• N1 and N2 30
• Check
• Performed
• 30 30 and 30 30

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Two Sample T-Test

• Test Statistic

2.2543
P( t gt 2.2543) .0142
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Conclusion

• We reject the Ho because the p-value is less than
  alpha level of .05. We have sufficient evidence
  that the mean overflow of McDonalds large fries
  is greater than the mean overflow of Wendys
  large fries.

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Burger Test Assumptions

• Assumptions
• 1. Two independent SRS
• 2. Two Normal Populations
• or
• N1 and N2 30
• Check
• Performed
• Performed test without meeting assumption

25
Two Sample Burger T-Test

• gt

gt
-11.3526
P (t gt -11.3526) 9.74 x 10-12
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Conclusion

• We reject the Ho because the p-value is less than
  alpha level of .05. We have sufficient evidence
  that the mean extra weight of McDonalds
  hamburger is greater than the mean extra weight
  of Wendys hamburger.

27
Bias/Error

• Errors in measuring with the scale
• Different workers serving the fries
• Different amounts of salt

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Personal Conclusion

• In completing this project we learned new facts
  about the fast food industry. We proved that even
  though the company says their large fries are a
  certain size, this may not be true. We proved
  that at both Wendy's and McDonalds the average
  weight of their large fries were both more then
  the claimed weight. As well as discovering that
  McDonalds burgers are larger compared to their
  claimed weight then the burgers at Wendy's.