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 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.

Data Collection  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 1 st floor of Old Main  Survey participants were diverse

Presentation of Data  Of the 48 participants: Pie Chart of Gender Category  27 males and 21 females Female Male  Mean age 21 years 43.8% 56.3%  Range 18 to 55 years old

Presentation of Data 

Presentation of Data  Grade Level Participant Status: Category Freshman Junior other  9 freshmen 12.5% 18.8% Senior Sophomore  6 sophomores 29.2% 25.0%  2 juniors 14.6%  14 seniors  7 other which represented graduate students, faculty, and staff of Minot State University

Preferred Sample Data  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 Confidence Intervals  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 Chart  Preferred Sample Category Chips Ahoy Chewy Chips Ahoy Crunchy 18.8% Great Value Chewy 20.8% Great Value Crunchy 18.8% 41.7%

Normal Preference Crunchy vs. Soft  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  Pie Chart of Normally Prefer Category Crunchy Soft 29.2% 70.8%

Preferred vs. Chosen   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 

Gender Differences Name Brand vs. Generic   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 

Cookie Sample Data  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 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 27.76% 23.60% 22.45% 26.39% (Weight) Ratio $0.061 Price per Cookie $0.087 $0.072 $0.075

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.

Cookie Weight Data Confidence Intervals  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 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.

Cookie Weight Data Tukey’s Significance   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

Chewy Vs. Crunchy Cookie Weight Data  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 Confidence Intervals  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

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.

Conclusion Hypotheses Results   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)

Discussion Changes for Improvement  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 Why do you care?   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!

Questions?  Thank you!