the cookie competition
DESCRIPTION
The Cookie Competition. Tiffany Morris Matthew Bradwisch Carly Alm. Samples. Chips Ahoy! Brand Chewy Crunchy Great Value Brand Chewy Crunchy. Hypotheses. Chips Ahoy! would be the preferred brand Normally preferred type would be the same as chosen sample type (Soft vs. Chewy) - PowerPoint PPT PresentationTRANSCRIPT
The Cookie Competition
Tiffany MorrisMatthew Bradwisch
Carly Alm
Chips Ahoy! Brand Chewy Crunchy
Great Value Brand Chewy Crunchy
Samples
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
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
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
Of the 48 participants: 27 males and 21 females Mean age 21 years Range 18 to 55 years old
Presentation of Data
FemaleMale
Category
56.3%43.8%
Pie Chart of Gender
Presentation of Data
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 DataFreshmanJuniorotherSeniorSophomore
Category
12.5%
29.2%
14.6%
25.0%
18.8%
Grade Level
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
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 SampleConfidence Intervals
Preferred Sample
ChartChips Ahoy ChewyChips Ahoy CrunchyGreat Value ChewyGreat Value Crunchy
Category
20.8%
18.8%41.7%
18.8%
Preferred Sample
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 PreferenceCrunchy vs. Soft
Normal PreferenceCrunchy vs. Soft
CrunchySoft
Category
70.8%
29.2%
Pie Chart of Normally Prefer
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
Preferred vs. Chosen
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 sampleWe 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 DifferencesName Brand vs.
Generic
Gender Differences
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
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.
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 DataConfidence Intervals
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.
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
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. CrunchyCookie Weight Data
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. CrunchyConfidence Intervals
Price per Cookie
Tukey’s Test ResultsTukey’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.
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)
ConclusionHypotheses Results
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
DiscussionChanges for
Improvement
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!
DiscussionWhy do you care?
Thank you!
Questions?