Investigating Nabisco's claim that double stuf Oreos contain double the stuff

Testing the “Double Stuf” Claim Students: Brooke Butterworth, Ward Jones, Alyssa Grigg, Laura Falconi, Alexandra Corvese, Hannah Green Mentors: Dr. Paul Dawson and Dr. Rose Martinez-Dawson Results The objective of this study was to test Nabisco’s claim that Double Stuf Oreos contain double the “stuf” when compared to original Oreos. Six packages of each type of cookie were purchased from 3 local grocery stores. For each package, 10 cookies were randomly selected using a random number generator. Sixty of each cookie type was used in this study. Total cookie weight, weight of each cookie side and cream weight were measured in grams for each cookie. Results from a t-test indicate no evidence that consumers are getting less than double the “stuf” and a 95% confidence interval constructed for the ratio of means also supports this. Methods Conclusion We failed to reject the null hypothesis that the mean cream mass of Double Stuf Oreos is double that of original Oreos because our approximate p-value was greater than the significance level of 0.05. Therefore we concluded that there was insufficient evidence to conclude that the mean cream mass for Double Stuf Oreos is less than twice the mean cream mass of Original Oreos. “Table 2: Confidence Intervals” Then, the first wafer was removed and weighed . Next, the cream was scraped off the remaining wafer using a knife and the cream was weighed alone. Then, the other Oreo wafer was weighed individually and recorded. This same procedure was repeated for the Double Stuf Oreos. Finally, the mean and standard deviations of the creams were calculated. A two independent sample t-test was performed and statistical significance was determined at a significance level of 0.05. In addition, confidence intervals to estimate the ratio of mean cream mass was also determined using www.graphpad.com/quickcalcs/errorProp2.