Exploring Measurement in the Food Industry

During this lab exercise we were trying to discover whether each bag of Cheetos had the same mass, and if the buyers (us) were  getting what they payed for. We first began the lab by gathering four bags of cheetos and labeling them one through four. We then weighed each bag of cheetos with the content inside (one bag at a time) on a scale. Each weight was recorded onto a table, this first weight was called the "Gross weight" meaning that this was the initial weight of the unopened bags with the amount of cheetos it came with. We then emptied the content of each bag onto a paper towel, followed by taking the Empty bags back with us back to the scale. Once again we weighed each back individually and recorded the weight onto the table. This time there was nothing in the bags and this weight was called the "Tare weight" meaning the weight of the bag with out the cheetos. The next step we took was to accumulate our "Net Weight" which was the amount of "Tare weight" minus the amount of "Gross weight". The amount of the subtraction would give us our net weight otherwise know as the mass of cheetos in each bag. For bag one the Gross weight was 30.48grams, the Tare weight was 1.53grams. With those numbers being subtracted from one another it leaves us with 28.95 grams. That number being our net weight and or mass of the cheetos in bag one. The gross weight  for bag two was 30.13grams,  the Tare weight was 1.54grams meaning that the net weight is equal to 28.59 grams.  For  bag three the gross weight was 29.93grams the tear weight was 1.56grams meaning that the net weight equals 28.37grams.  And last but not least bag four,  the gross weight was 29. 23gramsb and the Tare  weight was 1.55grams causing  the net weight to be  27.68grams. We chose to gather our data this way because we felt it was the most precise and accurate way.  Our accuracy was a net weight of +0.10 g and -0.10 g. Causing our range to go from  28.2 g to 28.3 g to 28.4 g.   Our Percision on the other hand is defined as our variance. Which In this case is the greatest mass minus the least mass being less than or equal to 0.20 g.  With our calculations the greatest mass was 28.95 g  ( -)  27. 68 g which is our least mass equaling up to  1.27g.  So are precision being 1.27 g is not  less than or equal to 0.20 g. Based on our accuracy and Percision we believe that we do not get what we paid for.  In fact we get more because the net weight/ mass of Cheetos is not Equal throughout and, the accuracy and precision is different for each bag. Our evidence is based on the  greatest mass  and least mass  not staying within the variance and each bags net weight not complying with the range. Only one of the four bags of Cheetos stayed within the range. That bag being bag number three. Bag three had a net weight (mass) of 28.37 g.  While all the other bags did not stay within the range. Based off of  all the data we have gathered we feel that our claim is being very well supported. Our reasoning is based on the accuracy and precision as well as hard factual evidence, each calculation we have made followed the rules we were given. We also used the same exact steps with each bag, so that our data would be accurate. We recorded everything in our table and double checked out calculations with a calculator as well as amongst our group. We took criticism from the other groups that evaluated our poster and used it as constructive criticism to better our claim, evidence and reasoning. Our lab was done accurately and precisely to make sure we had the correct mass information about the various bags of chips.