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Tiffany Morris Matthew Bradwisch Carly Alm
Tiffany Morris Matthew Bradwisch Carly Alm Samples Chips Ahoy! - - PowerPoint PPT Presentation
Tiffany Morris Matthew Bradwisch Carly Alm Samples Chips Ahoy! - - PowerPoint PPT Presentation
Tiffany Morris Matthew Bradwisch Carly Alm Samples Chips Ahoy! Brand Great Value Brand Chewy Chewy Crunchy Crunchy Hypotheses Chips Ahoy! would be the preferred brand Normally preferred type would be the same
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Chips Ahoy! would be the preferred brand Normally preferred type would be the same as chosen sample type (Soft vs. Chewy) We believed the name brand cookie would contain more chocolate chips per cookie and have a higher price per cookie.
Hypotheses
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Experimental data collection
Selection of sample cookies from population Weights of cookies as a whole (grams) Separation of cookie dough and chips Chips weighed separate (grams)
Data Collection
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Survey Data
4 sample cookies to chose from 48 surveys were completed Survey located on 1st floor of Old Main Survey participants were diverse
Data Collection
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Of the 48 participants:
27 males and 21 females Mean age 21 years Range 18 to 55 years old
Presentation of Data
Female Male
Category
56.3% 43.8%
Pie Chart of Gender
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Presentation of Data
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Participant Status:
9 freshmen 6 sophomores 2 juniors 14 seniors 7 other which represented graduate students, faculty, and staff of Minot State University
Presentation of Data
Freshman Junior
- ther
Senior Sophomore
Category
12.5% 29.2% 14.6% 25.0% 18.8% Grade Level
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Of the 48 participants:
20 chose Chips Ahoy! Crunchy
10 chose Great Value Crunchy 9 chose Chips Ahoy! Chewy 9 chose Great Value Chewy
Sample Winner - Chips Ahoy! Crunchy
Preferred Sample Data
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We are 95% confident that, in the population of MSU students and faculty
27.7% to 55.6% would prefer Chips Ahoy! Crunchy 9.3% to 32.2% would prefer Great Value Crunchy 7.7% to 29.8% would prefer Chips Ahoy! Chewy 7.7% to 29.8% would prefer Great Value Chewy
Preferred Sample Confidence Intervals
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Preferred Sample Chart
Chips Ahoy Chewy Chips Ahoy Crunchy Great Value Chewy Great Value Crunchy
Category
20.8% 18.8% 41.7% 18.8% Preferred Sample
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Of the 48 participants
14 or 29.2% normally preferred crunchy 34 or 70.8%normally preferred soft 68% of those that normally preferred soft cookies chose a crunchy sample 50% of those that normally preferred crunchy cookies chose a soft sample
Normal Preference Crunchy vs. Soft
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Normal Preference Crunchy vs. Soft
Crunchy Soft
Category
70.8% 29.2% Pie Chart of Normally Prefer
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We are 90% confident that of those who normally preferred soft cookies 54.45% to 80.84% would choose a crunchy
sample
We are 90% confident that of those who normally preferred crunchy cookies 28% to 72% would choose a chewy
sample Test of Independence: There was sufficient evidence to suggest that normally preferred and sample chosen are independent for MSU students and faculty.
Preferred vs. Chosen
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Preferred vs. Chosen
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71.43% of females chose Chips Ahoy! in the sample. 51.85% of males chose Chips Ahoy! and 48.15% of males chose Great Value in the sample We are 95% confident that, in the population of MSU students and faculty,
7.4% less to 46.6% more females than males would chose Chips Ahoy!, the name brand.
Interval includes 0 No significant difference between female and male choices
Gender Differences Name Brand vs. Generic
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Gender Differences
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Chips Ahoy! Chewy had highest ratio of chips per cookie at 27.76% mean cookie weight of 13.8 grams price per cookie of $0.087
Cookie Sample Data
Means for: Chips Ahoy! Chewy Chips Ahoy! Crunchy Great Value Chewy Great Value Crunchy Cookie Weight 13.8 grams 11.2 grams 13.6 grams 10.9 grams Chip Weight 3.8 grams 2.9 grams 3.2 grams 2.5 grams Chip to Cookie (Weight) Ratio 27.76% 26.39% 23.60% 22.45% Price per Cookie $0.087 $0.072 $0.075 $0.061
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Chips per Cookie
The Chips Ahoy! brand had more chips per cookie than the Great Value brand, in our sample. Using an Chi-square Goodness of Fit Test Chips per cookie ratio different per brand? Using α=0.05, we got a χ²=0.0718 and a p- value of 0.995 Chips per cookie ratio is not significantly different between brands, in the population.
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We are 95% confident that the mean cookie weights for population of each brand are 13.0 to 14.6 grams Chips Ahoy! Chewy 10.3 to 12.1 grams Chips Ahoy! Crunchy 13.1 to 14.1 grams Great Value Chewy 10.4 to 11.4 grams Great Value Crunchy
Cookie Weight Data Confidence Intervals
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Cookie Weight Data Tukey’s Test Results
Tukey’s Test Results: Individual 95% CIs For Mean Based on Pooled StDev Level -----+---------+---------+---------+---- Great Value Chewy (----*-----) Great Value Crunchy (-----*----) Chips Ahoy Chewy (----*----) Chips Ahoy Crunchy (----*-----)
- ----+---------+---------+---------+----
10.8 12.0 13.2 14.4 Grouping Information Using Tukey Method N Mean Grouping Chips Ahoy Chewy 10 13.800 A Great Value Chewy 10 13.600 A Chips Ahoy Crunchy 10 11.200 B Great Value Crunchy 10 10.900 B Means that do not share a letter are significantly different.
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Mean cookie weights of the chewy samples were not significantly different from each other Mean cookie weights of the crunchy samples were not significantly different from each other Mean cookie weights of the chewy samples were significantly different than the crunchy samples
Cookie Weight Data Tukey’s Significance
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Data Combined for Chewy vs Crunchy Chips Ahoy! Chewy + Great Value Chewy Chips Ahoy! Crunchy + Great Value Crunchy Mean cookie weights 13.70 grams chewy samples 11.05 grams crunchy samples
Chewy Vs. Crunchy Cookie Weight Data
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We are 95% confident that, in the population of the brands, the mean cookie weights are 13.3 to 14.1 grams for chewy 10.6 to 11.5 grams for crunchy We are 95% confident that the average cookie weight for the chewy cookies is 2.0 to 3.3 grams heavier than the crunchy cookies, in the population
Chewy Vs. Crunchy Confidence Intervals
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Price per Cookie Tukey’s Test Results
Tukey’s Test Results: Individual 95% CIs For Mean Based on Pooled StDev Level ---+---------+---------+---------+------ GV Chewy price per cooki (---*---) GV Crunchy price per coo (---*---) CA Chewy price per cooki (---*---) CA Crunchy price per coo (---*---)
- --+---------+---------+---------+------
0.060 0.070 0.080 0.090 Grouping Information Using Tukey Method N Mean Grouping CA Chewy price per cookie 10 0.087121 A GV Chewy price per cookie 10 0.074680 B CA Crunchy price per cookie 10 0.072165 B GV Crunchy price per cookie 10 0.060928 C Means that do not share a letter are significantly different.
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Chips Ahoy! Crunchy is the winner! Chips Ahoy! was more preferred brand Normally preferred is independent of chosen sample type (Soft vs. Chewy) The chip to cookie ratios were not significantly different Chips Ahoy! Chewy highest price per cookie Great Value Crunchy lowest price per cookie Chips Ahoy! Crunchy and Great Value Chewy not significantly different (price per cookie)
Conclusion Hypotheses Results
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For the Survey: More locations around campus Different times More surveys Age confidentiality- ex. locked survey box For Cookie Data: More accurate scale Better method for separating chips
Discussion
Changes for Improvement
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Saves you time choosing at the store! If you prefer soft cookies, you may want to try a crunchy one. You may like it better! Chips per cookie are the same, so go ahead! Need to find a cookie everyone (or at least the majority) will love… Chips Ahoy! Crunchy!
Discussion Why do you care?
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